Patent Publication Number: US-2023142845-A1

Title: Adaptive support accessory for mobile devices

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 17/028,745, entitled “ADAPTIVE SUPPORT ACCESSORY FOR MOBILE DEVICES,” and filed on Sep. 22, 2020, which is specifically incorporated by reference herein for all that it discloses or teaches. 
    
    
     BACKGROUND 
     The use of mobile devices has become nearly ubiquitous in modern society. Owing largely to their usefulness, mobile devices have become so indispensable to modern life that it is not unusual for users to keep some type of mobile device with them at all times. Although mobile devices come in a variety of shapes and sizes, most devices are ostensibly designed to be held in a user&#39;s hand with the device resting in a user&#39;s palm and supported by the fingers, leaving the user&#39;s thumb free to manipulate the device. With the exception of certain use-case scenarios where two-handed interaction may be more expedient or secure, a user may frequently find one-handed operation of their mobile device preferable, particularly insofar as it leaves their other hand free to engage in different tasks. In practice, however, the size and shape of modern mobile devices makes them difficult to hold and operate single-handedly. 
     Consequently, a variety of accessories for mobile devices have been proposed. While ostensibly aimed at addressing the need for improved handling and operation of mobile devices, in practice, many of these accessories only exacerbate unwanted issues hindering usability. When attached to a surface of the mobile device many of these accessories protrude so significantly that they cause undesirable complications for users, such as when trying the user tries to insert or remove the mobile device from their pocket, operate the device when positioned on a flat surface, or attempts to inductively charge the device&#39;s battery. While there are many different types of accessories that include some type of gripping or holding apparatus, many of these accessories necessitate fixing a user&#39;s fingers or hand in one position relative to the mobile device, restricting the flexion of a user&#39;s fingers and wrist and making it difficult for users to easily and securely adjust their grip in order to effectively interface with the outer portions of the device&#39;s display. Moreover, many of these types of accessories utilize components that are susceptible to premature wear or failure, which can result in unwanted expense and increased potential risk of damage to the mobile device. Still other types of mobile accessories are a one-size fits all type of apparatus, frequently designed for accommodating no more than one of a user&#39;s fingers and often resulting in a fit that presents users with a trade-off between comfort and security. Furthermore, many of these accessories require the use of two hands to deploy or operate, thereby reducing the practical effectiveness and utility for improved single-handed use they were intended to provide. 
     In addition to usability issues, the size and frangibility of mobile devices can make personal concurrent conveyance of other common everyday carry items challenging. While the technological capabilities included in many modern mobile devices may have reduced the need for user&#39;s to convey certain types of everyday items like cameras or flashlights, the sheer size of modern mobile devices can leave little room in one&#39;s pocket for accommodating items that a user might frequently find useful or desirable. Moreover, because the surface displays of modern mobile devices such as mobile phones are so susceptible to damage and expensive to repair, conveying other types of everyday carry items in close proximity with these types of devices can pose a substantial and costly risk to users. 
     In many instances, a user may even find that hands-free use of a mobile device is more appropriate and preferable. Unfortunately, most mobile devices don&#39;t provide any incorporated mechanism for supporting hands-free use. As a result, users are often required to purchase complicated or expensive equipment typically designed to support just one limited hands-free use case scenario, such as mounting a mobile device to the dashboard of a vehicle or propping a mobile device up on a flat support surface. 
     Due to the lack of versatility present in most modern mobile accessories, a user may feel compelled to purchase a variety of different accessories in order to fully accommodate the wide range of different hands-free use case scenarios that are now commonplace. Upon examination, none of the prior art can be shown to satisfy the requirements for sufficiently enabling effective single-handed operation of modern mobile devices, accommodating concomitant transport of everyday carry items, and providing for the variety of different hands-free use case scenarios common among modern mobile device users. 
     SUMMARY OF THE INVENTION 
     The inventions described and claimed herein address the aforementioned problems by providing an adaptive support accessory that is attached to a surface of a mobile device and enables effective and secure single-handed operation of the mobile device, supports a variety of common hands-free use case scenarios, adjusts to fit a variety of different users, accommodates concomitant transport of everyday carry items, provides users with kinetic amusement, and is adaptable to a wide variety of different holding, transporting, positioning and mounting configurations. These and other features and advantages of one or more aspects will be apparent from a consideration of the drawings and ensuing detailed description. 
     Implementations described and claimed herein provide an adaptive support accessory including a base attachable to a mobile device, a cap coupled to the base, one or more supports attached to the cap, and a detachably attachable plug. 
     Implementations described and claimed herein further provide a method of using an adaptive support accessory comprising attaching a base to a surface of a mobile device via a removable attachment interface; attaching a cap and one or more supports to the base; extending one or more supports from a retained position to a deployed position using one or more fingers of a user&#39;s hand; rotating the cap and/or one or more supports around the base; engaging one or more fingers of a user&#39;s hand with one or more of the cap, base, plug, and one or more supports; rotating one or both of the base and mobile device around the cap and/or one or more supports; and retracting one or more supports from a deployed position to a retained position using one or more fingers of a user&#39;s hand. 
     Additional methods of using the adaptive support accessory further comprise attaching one or both of a plug and an attachment element to the adaptive support accessory; attaching one or more of the cap, base, and plug to one or both of a compatible mount and mounting structure, engaging one or more fingers of a user&#39;s hand with one or both of an interior and exterior perimetric face of the adaptive support accessory; attaching one or more of the cap, base, plug and one or more extended supports to one or both of a compatible mount and mounting structure; rotating one or both of the base and mobile device around the cap and/or one or more supports; 
     positioning one or more supports on a support surface to dispose the mobile device in a preferred orientation; and rotating the cap and/or one or more supports around the base to change the orientation of the mobile device. 
     Implementations described and claimed herein still further provide an adaptive support accessory comprising an intermediate mounting pad for configuring a mobile device for attachment to the attachment interface, a plug removal feature for detaching one or more attachable plugs, attachment features and attachment elements disposed in one or more components of the accessory and configured for attaching different accessory components together and/or attaching the accessory to a mount or mounting structure, and a mount and mounting structure configured for attachment to one another and/or the accessory. 
     Other implementations are also described and recited herein. This Summary is provided to introduce a section of concepts in a simplified form that are further described below in the Detailed Descriptions. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    illustrates a top view of an example adaptive support accessory shown affixed to a mobile device and held in a user&#39;s hand, in accordance with an aspect of the present invention. 
         FIG.  2    illustrates a top perspective view of an example adaptive support accessory affixed to a mobile device, with a first support extended in a deployed position, a second support retracted in a retained position, and a plug disposed in the center of the accessory. 
         FIG.  3    illustrates a top perspective projected view of an example adaptive support accessory affixed to a mobile device with two supports retracted in a retained position and a detachably attachable plug configured for attachment to the accessory. 
         FIG.  4 A  illustrates a top perspective view of an example adaptive support accessory with two supports retracted in a retained position. 
         FIG.  4 B  illustrates a sectional view of the example adaptive support accessory of  FIG.  4 A   
         FIG.  4 C  illustrates an enlarged sectional view of  FIG.  4 B . 
         FIG.  4 D  illustrates a top exploded perspective view of an example adaptive support accessory with a base, two supports, a cap, and a plug. 
         FIG.  4 E  illustrates a bottom exploded perspective view of an example adaptive support accessory with a base, two supports, a cap, and a plug. 
         FIG.  4 F  illustrates a top perspective sectional view of an example adaptive support accessory. 
         FIG.  4 G  illustrates a top view of an example adaptive support accessory. 
         FIG.  4 H  illustrates a bottom view of an example adaptive support accessory. 
         FIG.  4 I  illustrates a top perspective view of an example adaptive support accessory. 
         FIG.  4 J  illustrates a bottom perspective view of an example adaptive support accessory. 
         FIG.  4 K  illustrates a front view of an example adaptive support accessory. 
         FIG.  4 L  illustrates a side view of an example adaptive support accessory. 
         FIG.  5 A  illustrates a top exploded perspective view of a base, an attachment interface, and a protective cover. 
         FIG.  5 B  illustrates a top perspective view of an attachment interface. 
         FIG.  5 C  illustrates a top perspective view of a base attached to an attachment interface. 
         FIG.  5 D  illustrates a top perspective view of an intermediate mounting pad. 
         FIG.  5 E  illustrates a top perspective projected view of a base attached to an intermediate mounting pad affixed to a mobile device and two supports attached to a cap axially aligned with and attachable to the base. 
         FIG.  6 A  illustrates a top perspective projected view of an example adaptive support accessory affixed to a mobile device with a flexible plug removal feature disposed in the center of the accessory and a detachably attachable plug. 
         FIG.  6 B  illustrates a top perspective view of a plug configured with a flexible plug removal feature. 
         FIG.  6 C  illustrates a top perspective view of a plug configured with a rigid plug removal feature. 
         FIG.  6 D  illustrates a top perspective view of an example adaptive support accessory affixed to a mobile device with a flexible plug removal feature extending over a cap and retained between the cap and a support. 
         FIG.  7 A  illustrates a top exploded perspective view of an example adaptive support accessory with a detachably attachable plug, and multiple attachment elements and attachment features. 
         FIG.  7 B  illustrates a side projected view of an example adaptive support accessory affixed to a mobile device, with a mount configured with an attachment feature and an attachment element and affixed to a mounting structure configured with two accessory engagement features. 
         FIG.  7 C  illustrates a side view of an example adaptive support accessory affixed to a mobile device with a support attached to a hook-shaped accessory engagement feature disposed in a mounting structure. 
         FIG.  8 A  illustrates a side view of an example adaptive support accessory affixed to a mobile device and held in a user&#39;s hand, with a first and second finger of a user&#39;s hand engaged with an interior perimetric face of the accessory and a third finger engaged with an exterior perimetric face of a support. 
         FIG.  8 B  illustrates a top view of an example adaptive support accessory affixed to a mobile device and held in a user&#39;s hand, with a first finger of a user&#39;s hand engaged through a first support, a second finger engaged with an exterior perimetric face of a second support, and a third finger engaged with an exterior perimetric face of a cap. 
         FIG.  8 C  illustrates a top view of an example adaptive support accessory affixed to a mobile device and held in a user&#39;s hand, with a first and second finger of a user&#39;s hand engaged through two supports. 
         FIG.  8 D  illustrates a top view of an example adaptive support accessory affixed to a mobile device and held in a user&#39;s hand, with a first and second finger of the user&#39;s hand engaged through two supports and the user&#39;s thumb rotating the mobile device and base affixed thereto about an axis of rotation. 
         FIG.  9 A  illustrates a side view of an example adaptive support accessory affixed to a mobile device, with a support extended in a deployed position and supporting the mobile device in a first example portrait orientation. 
         FIG.  9 B  illustrates a side view of an example adaptive support accessory affixed to a mobile device, with two supports extended in a deployed position and supporting the mobile device in a second example portrait orientation. 
         FIG.  9 C  illustrates a bottom perspective view of an example adaptive support accessory affixed to a mobile device, with two supports extended in a deployed position and supporting the mobile device in a first example portrait orientation. 
         FIG.  9 D  illustrates a top perspective view of an example adaptive support accessory affixed to a mobile device, with a support extended in a deployed position and orienting the mobile device in a first example landscape orientation. 
         FIG.  9 E  illustrates a bottom perspective view of an example adaptive support accessory affixed to a mobile device, with two supports extended in a deployed position and orienting the mobile device in a second example landscape orientation. 
         FIG.  10    illustrates example operations for using an example adaptive support accessory. 
         FIG.  11 A  illustrates a top perspective exploded view of a disc-shaped accessory cover attachable to the top of a plug. 
         FIG.  11 B  illustrates a bottom perspective view of a disc-shaped accessory cover attached to the top of a plug. 
         FIG.  11 C  illustrates a top perspective exploded view of a disc-shaped accessory cover attachable to the top of a cap. 
         FIG.  11 D  illustrates a top perspective exploded view of a ring-shaped accessory cover attachable to the top of a cap. 
         FIG.  11 E  illustrates a top perspective sectional view of a flanged accessory cover with an aperture disposed in the bottom and a partially enclosed bottom. 
         FIG.  11 F  illustrates a top perspective sectional view of a flanged accessory cover with an aperture disposed in the center and an enclosed bottom. 
         FIG.  11 G  illustrates a top perspective sectional view of a flanged accessory cover with an aperture disposed in the center and a recess disposed in an interior perimetric face. 
         FIG.  12 A  illustrates a top perspective view of a plug configured with a twist lock attachment feature and an attachment element. 
         FIG.  12 B  illustrates a top perspective view of a plug with an attachment feature configured for attachment to an expandable grip. 
         FIG.  12 C  illustrates a top view of a plug and a cap with an alignment indicator disposed on a top surface. 
         FIG.  12 D  illustrates a top perspective view of a plug with a selectively rotatable center portion with different attachment elements disposed on opposite faces thereof. 
         FIG.  12 E  illustrates a top perspective sectional view of a plug with a selectively attachable and reversible center portion with different attachment elements disposed on opposite faces thereof. 
         FIG.  12 F  illustrates a top perspective view of a plug with a magnetic attachment element configured with a plug removal feature. 
         FIG.  12 G  illustrates a top perspective view of a plug with two selectively rotatable attachment features. 
         FIG.  12 H  illustrates a top perspective view of a plug with a rotatable center portion. 
         FIG.  12 I  illustrates a top perspective view of a plug with a threaded attachment feature and a flanged bottom. 
         FIG.  12 J  illustrates a top perspective view of a plug configured with an attachment hole and a plug removal feature and disposed in a plug receptacle. 
         FIG.  13 A  illustrates a top perspective view of a plug configured with an extendable and retractable knife and bottle opener. 
         FIG.  13 B  illustrates a top perspective view of a plug configured with a rotatably extendable bottle opener and box cutter. 
         FIG.  13 C  illustrates a top perspective view of a plug container configured with a hinged lid and a magnetic closure. 
         FIG.  13 D  illustrates a top perspective view of a plug configured with a rotatably extendable key. 
         FIG.  14 A  illustrates a top perspective view of an example accessory with a plug and a cap each configured with corresponding design elements. 
         FIG.  14 B  illustrates a top perspective view of an example accessory with a circular aperture disposed in the center of a plug. 
         FIG.  14 C  illustrates a top perspective view of an example accessory with a heart-shaped aperture disposed in the center of a plug. 
         FIG.  14 D  illustrates a top perspective view of an annular-shaped example accessory with an aperture disposed in the center of the accessory. 
         FIG.  14 E  illustrates a top perspective view of a substantially square-shaped example accessory. 
         FIG.  14 F  illustrates a top perspective view of a substantially rectangular-shaped example accessory. 
         FIG.  14 G  illustrates a top perspective view of a substantially circular-shaped example accessory with two flat sides disposed opposite one another. 
         FIG.  14 H  illustrates a top perspective view of a substantially oblong-shaped example accessory. 
         FIG.  14 I  illustrates a top perspective view of a substantially hexagonal-shaped example accessory. 
         FIG.  14 J  illustrates a top perspective view of an example accessory including a substantially polygonal-shaped cap. 
         FIG.  14 K  illustrates a top perspective view of a substantially heart-shaped example accessory. 
         FIG.  14 L  illustrates a top view of an example accessory with a shape and ornamentation depicting a fictional creature. 
         FIG.  15 A  illustrates a top perspective view of a base with a partially enclosed bottom center portion. 
         FIG.  15 B  illustrates a top perspective sectional view of a cap with an enclosed bottom center portion. 
         FIG.  15 C  illustrates a bottom perspective view of a cap with an enclosed top center portion. 
         FIG.  15 D  illustrates a top perspective view of a cap with an enclosed top. 
         FIG.  15 E  illustrates a top perspective sectional view of a cap with a fourth annular cap protrusion. 
         FIG.  15 F  illustrates a top perspective sectional view of an example accessory with a base and a cap configured with a pair of corresponding engagement features. 
         FIG.  16 A  illustrates a top perspective sectional view of an example accessory with an outward extending base engagement feature and inward extending cap engagement feature. 
         FIG.  16 B  illustrates an enlarged sectional view of  FIG.  16 A . 
         FIG.  16 C  illustrates a top perspective sectional view of an example accessory with an outward extending base engagement feature and inward extending cap engagement feature. 
         FIG.  16 D  illustrates a top perspective sectional view of an example accessory with a cap extending over an annular base protrusion. 
         FIG.  16 E  illustrates a top perspective sectional view of an example accessory with three base components. 
         FIG.  16 F  illustrates a top perspective sectional view of an example accessory with two base components. 
         FIG.  16 G  illustrates a top perspective assembly view of an example accessory with two base components and an accessory cover attached to the top of a cap. 
         FIG.  16 H  illustrates a top perspective view of an example accessory with two base components and two cap components. 
         FIG.  16 I  illustrates a top perspective sectional view of  FIG.  16 H . 
         FIG.  16 J  illustrates a top perspective assembly view of  FIG.  16 H . 
         FIG.  17 A  illustrates a top perspective view of an example accessory with a support fastened to a cap. 
         FIG.  17 B  illustrates a top view of two supports connected together and fastened to a cap. 
         FIG.  17 C  illustrates a top perspective assembly view of  FIG.  17 B . 
         FIG.  18 A  illustrates a top perspective assembly view of two projections fastened to a cap. 
         FIG.  18 B  illustrates a top perspective view of two projections and supports fastened to a cap. 
         FIG.  18 C  illustrates a top perspective assembly view of  FIG.  18 B . 
         FIG.  18 D  illustrates a bottom perspective view of a cap configured with multiple exterior cap recesses and fastening blocks. 
         FIG.  18 E  illustrates a top perspective view of an example accessory with two projections and two supports attached to the cap via multiple fasteners. 
         FIG.  18 F  illustrates a top perspective assembly view  FIG.  18 E . 
         FIG.  19 A  illustrates a top perspective view of a rigid support attached to a cap. 
         FIG.  19 B  illustrates a top perspective view of an example accessory with three supports rotatably attached to a cap. 
         FIG.  19 C  illustrates a top perspective assembly view of  FIG.  19 B . 
         FIG.  19 D  illustrates a top perspective view of an example accessory with three supports rotatably attached to a cap. 
         FIG.  19 E  illustrates a top perspective assembly view of  FIG.  19 D . 
         FIG.  19 F  illustrates a top perspective view of a support rotatably attached to a plug. 
         FIG.  19 G  illustrates a top perspective view of an example accessory with three supports attached to a cap. 
         FIG.  19 H  illustrates a top perspective assembly view of  FIG.  19 G . 
         FIG.  19 I  illustrates a top perspective assembly view of two rigid supports rotatably attached to a cap and a third flexible support configured with an adjustable tensioner and disposed in a pair of projections attached to the cap via fasteners. 
         FIG.  19 J  illustrates a top perspective view of a flexible support configured with a mechanism for self-attachment and attached to a cap through a pair of slots. 
         FIG.  19 K  illustrates a top perspective view of a flexible support attached to a cap through a pair of slots and secured via fasteners. 
         FIG.  19 L  illustrates a bottom perspective view of a cap with fasteners disposed in opposite ends of the cap and configured for attaching a flexible support. 
         FIG.  19 M  illustrates a bottom perspective assembly view of a flexible support with a fastener attached at each end and configured for attachment to a cap through a pair of slots. 
         FIG.  19 N  illustrates a top perspective view of a plug with a flexible support attached to the plug through a pair of recesses disposed in the plug. 
         FIG.  19 O  illustrates a top perspective sectional view of  FIG.  19 N . 
         FIG.  19 P  illustrates a top perspective sectional view of a plug with a flexible support attached through a pair of recesses disposed in the plug. 
         FIG.  19 Q  illustrates a top perspective view of a plug with enlarged distal ends and disposed in a pair of recesses disposed in the plug. 
         FIG.  19 R  illustrates a top perspective view of a plug with enlarged distal ends and disposed in a pair of recesses disposed in the plug and a rigid prop attached to the support and configured for engagement with a pair of prop engagement features. 
         FIG.  19 S  illustrates a top perspective view of a plug with enlarged distal ends and disposed in a pair of recesses disposed in the plug and a rigid prop rotatably attached to the support and configured for engagement with a pair of prop engagement features. 
         FIG.  20 A  illustrates a bottom perspective assembly view of an example accessory with multiple magnetic attachment elements disposed in a cap and configured to attach to a magnetic attachment interface disposed in the bottom of a base. 
         FIG.  20 B  illustrates a bottom perspective assembly view of multiple magnetic attachment elements combinable together in a continuous shape and disposed in a cap. 
         FIG.  20 C  illustrates a bottom perspective assembly view of cap with an annular attachment element disposed therein. 
         FIG.  20 D  illustrates a top perspective sectional view of an example accessory with multiple magnetic attachment elements disposed in a cap and configured to attach to a magnetic attachment interface disposed in the bottom of a base, the cap including multiple annular cap protrusions disposed adjacent to an annular base protrusion. 
         FIG.  20 E  illustrates an enlarged sectional view of an example accessory with a ball bearing attachment element disposed in between a cap and a base. 
         FIG.  20 F  illustrates a top perspective assembly view of an example accessory with a magnetic bearing attachment element disposed in a cap configured to rotatably couple to a magnetic attachment interface disposed on a surface of a mobile device. 
         FIG.  20 G  illustrates a top perspective assembly view of an example accessory including a cap with a magnetic attachment element disposed therein and configured to attach to a magnetic attachment interface disposed in the top of a mobile device case and a plug with a magnetic attachment element disposed on a bottom surface thereof configured to attach to another attachment element disposed in the bottom interior of the case. 
         FIG.  20 H  illustrates top perspective assembly view of an example accessory with a cap rotatably coupled to a base attached to a magnetic attachment interface configured for attachment to a mobile device with multiple magnetic attachment elements disposed therein. 
         FIG.  21 A  illustrates a top perspective assembly view of an example accessory with a base substantially integrated into a surface of a mobile device case. 
         FIG.  21 B  illustrates a top perspective view of a base substantially integrated into a mobile device cover. 
         FIG.  21 C  illustrates a top perspective assembly view of an example accessory with a base of a shape and size generally conforming with and configured for attachment to a surface of a mobile device. 
         FIG.  21 D  illustrates a top perspective view of an example accessory with a base configured for attachment to two sides of a mobile device. 
         FIG.  21 E  illustrates a top perspective view of an example accessory with a base attached around two sides of the mobile device. 
         FIG.  21 F  illustrates a top perspective view of an example accessory disposed on top of an example second mobile accessory. 
         FIG.  21 G  illustrates a top perspective sectional view of an example second mobile accessory with a recess formed in the top configured for receiving a portion of a base. 
         FIG.  21 H  illustrates a top perspective sectional view of an example second mobile accessory configured to attach to a base. 
         FIG.  22 A  illustrates a top perspective view of a base with an opening formed in the bottom and extending through an exterior perimetric face thereof. 
         FIG.  22 B  illustrates a bottom perspective view of an attachment interface with two openings formed in the bottom surface thereof and attached to the bottom of a base. 
         FIG.  22 C  illustrates a top perspective view of an intermediate mounting pad with an opening formed in the top surface thereof. 
         FIG.  22 D  illustrates a top perspective view of a plug configured with a flexible support disposed in one end. 
         FIG.  22 E  illustrates a top perspective view of a plug disposed in a cap and configured with a flexible support extending outward through an opening formed in the bottom of a base. 
         FIG.  22 F  illustrates a top perspective assembly view of an electronic port connected to an electronic connector via a flexible cable and configured for connection with a second electronic port disposed in a plug. 
         FIG.  22 G  illustrates a top perspective assembly view of an example accessory with an electronic port disposed in a base and configured for connection with a second electronic port disposed in a plug. 
         FIG.  22 H  illustrates a top perspective view of an example accessory with an electronic connector attached to a mobile device and an electronic port configured for attachment to another electronic port disposed in a plug. 
         FIG.  23 A  illustrates a top perspective view of a flexible support disposed in one end of an intermediate mounting pad. 
         FIG.  23 B  illustrates a top perspective view of a flexible support disposed in a lateral projection of a base. 
         FIG.  23 C  illustrates a top perspective view of a flexible support and a rotatable rigid support disposed in a lateral projection of a base. 
         FIG.  23 D  illustrates a top perspective view of a rotatable rigid support disposed in a lateral projection of a base. 
         FIG.  23 E  illustrates a top perspective view of a rotatable rigid support attached to a lateral projection of a base. 
         FIG.  23 F  illustrates a top perspective view of a rotatable rigid support disposed in the bottom of a base with a stop extending from the support through an opening disposed in the bottom of the base. 
         FIG.  23 G  illustrates a top perspective view of an example accessory and support retainer attached to a mobile device, the accessory including three rotatable rigid supports extended in a deployed position. 
         FIG.  23 H  illustrates a side view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 I  illustrates a top perspective view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 J  illustrates a front view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 K  illustrates a back view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 L  illustrates a bottom perspective view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 M  illustrates a top view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  23 N  illustrates a bottom view of an example accessory with three rotatable rigid supports retracted in a retained position. 
         FIG.  24    illustrates a top perspective view of an example accessory with a base slidably disposed inside a base track. 
     
    
    
     DETAILED DESCRIPTIONS 
     The following disclosure is directed to accessories for mobile devices that improve a user&#39;s ability to hold, operate, mount, and position a mobile device. Variations of an adaptive support accessory are further directed to mobile device accessories that improve the usability and versatility of a mobile device. The accessory may be adaptive to the wide variety of common mobile device use-case scenarios and provides improved single-handed and hands-free use of a mobile device. In addition, multiple options for adapting and augmenting the utility of the mobile device are provided. The disclosed adaptable support accessory implementations are intended to address some or all of the foregoing problems with prior mobile device accessories, as well as additional problems with prior mobile device accessories not specifically identified herein. 
       FIG.  1    is a top view illustrating an example adaptive support accessory indicated generally at  1010  shown affixed to an exterior surface of an example mobile device  1012 , such as a cellular phone or tablet, and held in a user&#39;s hand  1014 . The adaptive support accessory  1010  (hereinafter referred to as “accessory”) enables the user to securely hold and operate the mobile device  1012  single-handedly by providing multiple engagement options for one or more fingers of the user&#39;s hand  1014 . 
       FIG.  2    is a top perspective view illustrating an example accessory  2010  affixed to an exterior surface of a mobile device  2012 . The accessory  2010  includes a base  2016  configured for attachment to a surface of the mobile device  2012  via one or more of an attachment interface (not shown, e.g., see  5042  in  FIG.  5 C ) and an intermediate mounting pad (not shown, e.g., see  5072  in  FIGS.  5 D- 5 E ), a cap  2018  rotatably coupled to the base  2016  and centered around an axis of rotation (not shown, e.g., see axis  3034  in  FIG.  3   ), one or more detachably attachable plugs  2028 , and one or more supports  2020 ,  2022  attached to one or more of the cap  2018 , base  2016 , and plug  2028 . 
     One or more supports  2020 ,  2022  attached to the cap  2018  may be retracted to a retained position (e.g., support  2022  in  FIG.  2   ) and/or extended to a deployed position (e.g., support  2020  in  FIG.  2   ). The supports  2020 ,  2022  provide an engagement feature by which the accessory  2010  can be held in a user&#39;s hand (e.g., see  FIGS.  1  and  8 A- 8 D ), attached to a mount or mounting structure (e.g., see  FIGS.  7 B- 7 C ), and positioned to support the mobile device  2012  in a preferred orientation on a support surface such as a table (e.g., see  FIGS.  9 A- 9 E ). In various implementations, one or more projections  2024 ,  2026  laterally disposed on opposite ends of the exterior perimeter of the cap  2018  are configured to limit the movement of one or more supports  2020 ,  2022  by at least one degree of freedom, restricting the supports from being extended beyond a pre-determined position with respect to the cap  2018 . In some implementations, the cap  2018 , supports  2020 ,  2022 , projections  2024 ,  2026 , and plug  2028  substantially surround and conceal the base  2016 . 
       FIG.  3    is a top perspective view illustrating an example accessory  3010  affixed to an exterior surface of a mobile device  3012 . A base (e.g., see base  4016  in  FIGS.  4 D- 4 E ) and a cap  3018  are rotatably coupled and centered about an axis of rotation  3034 . One or more supports  3020 ,  3022  attached to the cap  3018  may be retracted to a retained position wherein the accessory  3010  is able to maintain a low profile with respect to the mobile device  3012 , facilitating conveyance and storage of the accessory  3010  and affixed mobile device  3012 . One or more plugs  2028  may be permanently or detachably attached to the accessory  3010  to adapt and/or augment one or both of the accessory  3010  and the mobile device  3012 . In various implementations, the plug  2028  augments the utility, functionality, and ornamentation of the accessory  3010 . The plug  3028  may have an exterior perimeter generally conforming to an aperture  3030  disposed in the center of accessory  3010  and formed in one or both of the base and the cap  3018 . An interior perimetric face  3032  of the accessory  3010  circumscribing the aperture  3030  may provide an engagement for one or more of a user&#39;s fingers, a plug  3028 , a mount (e.g., see  7092  in  FIG.  7 B ), and a mounting structure (e.g., see  7094  in  FIG.  7 B ). 
       FIG.  4 A  is a top perspective view illustrating an example accessory  4010  with a cap  4018  rotationally coupled to a base  4016  and centered about an axis of rotation  4034 , with two supports  4020 ,  4022  attached to the cap  4018  and retracted in a retained position.  FIG.  4 B  is a top sectional perspective view of  FIG.  4 A .  FIG.  4 C  is an enlarged detail view of  FIG.  4 B .  FIG.  4 D  is a top exploded perspective view of an example accessory  4010 .  FIG.  4 E  is a bottom exploded perspective view of an example accessory  4010 .  FIG.  4 F  is a top perspective sectional view of an example adaptive support accessory.  FIG.  4 G  is a top view of an example adaptive support accessory  4010 .  FIG.  4 H  illustrates a bottom view of an example adaptive support accessory  4010 .  FIG.  4 I  is a top perspective view of an example adaptive support accessory  4010 .  FIG.  4 J  is a bottom perspective view of an example adaptive support accessory  4010 .  FIG.  4 K  is a front view of an example adaptive support accessory  4010 .  FIG.  4 L  is a side view of an example adaptive support accessory  4010 . 
     Referring to  FIGS.  4 A- 4 E , in various implementations, a base (e.g., base  4016 ) includes a first annular base protrusion (e.g., see protrusion  4036  in  FIG.  4 C ) extending longitudinally from the base  4016  and centered about an axis of rotation  4034 . The interior and exterior perimetric faces of the first annular base protrusion  4036  may be symmetrical or asymmetrical with respect to one another. The base  4016  may extend radially inward and/or outward from the first annular base protrusion  4036 , as shown in  FIG.  4 C . 
     A first base engagement feature (e.g., see feature  4038  in  FIG.  4 C ) may extend radially inward and/or outward from the first annular base protrusion  4036 . The first base engagement feature  4038  may have a profile and shape configured to engage with a corresponding feature of another component of the accessory  4010  such as a plug  4028  or a cap (e.g., cap  4018 ). In various implementations, the first base engagement feature  4038  is one of a type of mechanical joint or snap type connector and may operate by an interference fit or friction fit with another component of the accessory  4010 . In some implementations, the first base engagement feature  4038  is configured to engage with a corresponding engagement feature disposed in the cap  4018  (e.g., see feature  4046  in  FIG.  4 C ). In various implementations, the first base engagement feature  4038  is annular. In some implementations, the first base engagement feature  4038  is a permanent or removable annular snap. In other implementations, the first base engagement feature is a torsional or cantilevered snap. In other implementations, the first base engagement feature is a removable snap ring disposed in an annular recess formed in one of an interior and exterior perimetric face of the first annular base protrusion  4036 . In other implementations, the first base engagement feature includes one or more pins or fasteners attached to the base  4016  and laterally disposed through one or both of the interior and exterior perimetric faces of the first annular base protrusion  4036 . 
     The bottom of the base  4016  may have a profile generally conforming to a portion of one or more exterior surfaces of a mobile device (e.g., see device  3012  in  FIG.  3   ). In various implementations, an aperture  4030  formed in the center of the accessory  4010  may also be formed in the center of the base  4016  and may extend therethrough. In various implementations, the first annular base protrusion  4036  circumscribes the aperture  4030  formed in the base, defining an interior perimetric face  4032  of one or both of the base  4016  and the accessory  4010 . A first exterior base recess  4040  may be formed in the bottom of the base  4016  and may be configured to receive an attachment interface  4042  for attaching the base  4016  to one of a housing, case, and cover for the mobile device. In some implementations, the bottom of the base  4016  or a portion thereof is formed separately from the base  4016  and may be permanently or detachably attached. 
     The base  4016  may be substantially rigid or substantially flexible. The base  4016  may have a shape that is generally annular or circular. In various implementations, the base  4016  has a profile generally conforming to the shape and profile of the cap  4018  and/or one or more supports  4020 ,  4022 . A portion of one or both of an interior and exterior perimeter of the base  4016  may have a squared, rounded, or chamfered profile, and may be configured for facilitating removal of the base  4016  from the mobile device. In addition, indicia, such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of the base  4016 . 
     In various implementations, the cap (e.g., cap  4018 ) is rotatably coupled to the base  4016  about the axis of rotation  4034 . The cap  4018  may be permanently or detachably coupled to the base  4016 . As shown in  FIG.  4 C , the cap  4018  may include a first annular cap protrusion  4044  extending longitudinally from the cap  4018 , centered about the axis of rotation  4034 , and disposed adjacent to the first annular base protrusion  4036  extending longitudinally from the base  4016 . The interior and exterior perimetric faces of the first annular cap protrusion  4044  may be symmetrical or asymmetrical with respect to one another. The cap  4018  may extend radially inward and/or outward from the first annular cap protrusion  4044 . 
     In various implementations, the aperture  4030  formed in the center of the accessory is also formed in the center of the cap  4018  and may extend therethrough. The aperture  4030  formed in the cap  4018  may be axially aligned with and generally correspond to the aperture  4030  formed in the base  4016 , each aperture  4030  being either slightly larger or smaller in diameter with respect to the one another. In various implementations, the first annular cap protrusion  4044  circumscribes the aperture  4030 , defining an interior perimetric face  4032  of one or both of the cap  4018  and the accessory  4010 . In some implementations, the shape of the aperture  4030  may be circular or round. In other implementations, the shape of the aperture may be triangular, square, rectangular, or polygonal. One or both of the aperture  4030  and the interior perimetric face  4032  of the accessory  4010  may be configured to receive and engage one or more of a user&#39;s finger (e.g., see  FIG.  8 A ), a mount (e.g., see mount  7092  in  FIG.  7 B ), and a mounting structure (e.g., see mounting structure  7094  in  FIGS.  7 B- 7 C ). 
     As shown in  FIG.  4 C , the first annular cap protrusion  4044  may include one or more first cap engagement features  4046  extending radially inward and/or outward from the first annular cap protrusion  4044 . The first cap engagement feature  4046  may have a shape and profile configured to engage with a corresponding feature disposed in another component of the support accessory  4010  such as the plug  4028  or the base  4016 . The first cap engagement feature  4046  may be one of a type of mechanical joint or connector and may operate by an interference fit or friction fit with another component of the accessory  4010 . The first cap engagement feature  4046  may be configured to engage with a corresponding engagement feature disposed in the base  4016 , such as the first base engagement feature  4038 . In various implementations, the first cap engagement feature  4046  is annular. In some implementations, the first cap engagement feature  4046  is a permanent or removable annular snap. In other implementations, the first cap engagement feature is a torsional or cantilevered snap. In other implementations, the first cap engagement feature is a removable snap ring disposed in an annular recess formed in one of the interior and exterior perimetric faces of the first annular cap protrusion  4044 . In other implementations, the first cap engagement feature includes one or more pins or fasteners attached to the cap  4018  and laterally disposed through one or both of the interior and exterior perimetric faces of the first annular cap protrusion  4044 . 
     A second annular cap protrusion  4048  may extend longitudinally from the cap  4018  and define an exterior perimetric face  4050  of the cap  4018 . The exterior perimetric face  4050  of the cap  4018  may provide an engagement for one or more of a user&#39;s fingers, a mount, and a mounting structure. In some implementations, a third annular cap protrusion  4054  extends longitudinally from the cap  4018  and is disposed between the first and second annular cap protrusions  4044 ,  4048 . The third annular cap protrusion  4054  may be configured to provide structural reinforcement to the cap  4018  and aid in maintaining concentricity and engagement between the cap  4018  and the base  4016 . 
     As shown in  FIG.  4 C , a first interior cap recess  4052  may be formed in the bottom of the cap  4018  adjacent to the first annular cap protrusion  4044  and configured to receive at least a portion of one or both of the first annular base protrusion  4036  and the first base engagement feature  4038 . A second interior cap recess  4056  may be formed in the bottom of the cap  4018  adjacent to the second annular cap protrusion  4048 . In some implementations, one or both of the first and second interior cap recesses  4052 ,  4056  formed in the cap  4018  may be configured to receive and retain one or more ferrous or magnetic elements. In other implementations, one or more of the first, second, and third annular cap protrusions  4044 ,  4048 ,  4054  include one or more radially extending continuous or segmented engagement features arranged around the protrusion and configured to retain one or more ferrous or magnetic elements within the cap  4018 . In other implementations, third annular cap protrusion  4054  and second interior cap recess  4056  are omitted and the first annular base protrusion  4036  and first base engagement feature  4038  are disposed in the first interior cap recess  4052  between the first and second annular cap protrusions  4044 ,  4048 , as shown in  FIG.  4 F . In some implementations, a low-friction washer, spacer, or element made of a material such as PTFE or Teflon is disposed between the base  4016  and the cap  4018  in order to reduce friction between the components. In other implementations, one or more attachment elements such as bearing, selected from the group of bearings including, ball bearings, roller bearings, thin section bearings, race bearings, needle roller bearings, thrust bearings, or turntable type bearings, may be disposed in between or attached to one or both of the base  4016  and the cap  4018  to facilitate smooth and continuous rotation between the components (e.g., see bearing  20084  in  FIG.  20 D ). 
     The cap  4018  may be substantially rigid or substantially flexible. The cap  4018  may have a shape or profile that is substantially annular or circular. In other implementations, the cap has a shape that is substantially square, rectangular, oblong, or polygonal, as shown in  FIGS.  14 E- 14 J . Indicia, such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of the cap  4018  or another component attached thereto, as shown in  FIGS.  11 C- 11 D . In some implementations, a portion of the interior perimetric face  4032  of the cap  4018  may be over-molded, separately formed from, or detachably attached to the cap  4018 . In other implementations, one or more exterior portions of the cap may be extendable and collapsible. In other implementations, an expandable grip or knob may be disposed in or attached to the cap  4018 . One or both of the interior and exterior perimeters of the cap  4018  may have a squared, rounded, or chamfered profile. In some implementations, the top surface of the cap is sloped or angled. In other implementations, one or both of the top and bottom surfaces of the cap  4018  are substantially planar and flat. 
     In various implementations, one or more supports (e.g., supports  4020 ,  4022 ) are permanently or detachably attached to one or more components of the accessory  4010  and configured to engage with one or more of a user&#39;s fingers (e.g., see  FIGS.  8 A- 8 D ), a mount (e.g., see  FIG.  7 B ), and a mounting structure (e.g., see  FIG.  7 C ). One or more supports may be disposed in or attached to one or more of the base  4016 , the cap  4018 , and the plug  4028 . In some implementations, the supports  4020 ,  4022  are attached to the cap  4018  at their opposing distal ends. A portion of an interior perimetric face of one or more supports  4020 ,  4022  may be disposed adjacent to the exterior perimetric face  4050  of the cap  4018  when retracted in a retained position. In some implementations, one or more supports  4020 ,  4022  may have an interior profile generally conforming to at least a portion of the exterior profile of the cap  4018 . 
     In some implementations, one or more supports (e.g., supports  4020 ,  4022 ) are substantially rigid. One or more supports  4020 ,  4022  may be arc-shaped or ring-shaped. In other implementations, one or more supports may be flexible and in the general form of a strap, loop, band, ribbon, or cord (e.g., see supports  19164  in  FIGS.  19 G- 19 I ). One or more supports  4020 ,  4022  may have a profile that is substantially cylindrical or oval. In other implementations, one or more supports have an exterior profile that is sloped downward and outward at an angle. In some implementations, an exterior portion of one or more supports  4020 ,  4022  is flat, beveled, or chamfered and configured to maximize surface contact with a substantially flat support surface upon which they may be disposed (e.g., see support  4022   FIGS.  4 H- 4 K ). In other implementations, two or more proximally disposed projections (not shown) spaced apart and extending outward from the exterior the supports are configured to provide additional contact points for improved stability when placed on a flat support surface. In other implementations, one or both of the top and bottom of the supports are substantially flat (e.g., see  FIGS.  14 E- 14 H ). In other implementations, one or more supports include a projecting portion that is permanently or detachably attached (e.g., see supports  14020 ,  14022  in  FIG.  14 L ). In some implementations, the supports include an interior or exterior portion that is over-molded and configured for providing improved contact between the supports and one or more of a user&#39;s fingers and/or a support surface, (e.g., see inside portion of supports  19020 ,  19022  in  FIG.  19 C  and bottom edge and circumscribing aperture  23030  of support  23196  in  FIG.  23 D ). In other implementations, two supports are connected together at their distal ends by a flexible tether configured for preventing the supports from rotating beyond a predetermined position with respect to the cap  4018 . In other implementations, a proximal interior portion of the supports is spaced apart from the exterior perimetric face of the cap  4018  and configured to accommodate a user&#39;s fingers of larger diameter. In various implementations, the movement of one or more supports (e.g., supports  4020 ,  4022 ) attached to one of the base  4016  and the cap  4018  is restricted by at least one degree of freedom. 
     As shown in  FIGS.  4 D- 4 E ), a support arbor  4068  may be disposed in and extend laterally inward and/or outward from each distal end of the supports (e.g., supports  4020 ,  4022 ), about which the supports  4020 ,  4022  may pivot with respect to the cap  4018 . The support arbors  4068  may have a substantially cylindrical shape and round profile. In other implementations, one or more support arbors have a substantially semi-circular, square, or rectangular profile. In various implementations, one or more pairs of exterior cap recesses  4058  formed in opposite sides of the exterior of the cap  4018  are configured to receive a portion of a corresponding pair of support arbors  4068  and wherein the movement of the arbors  4068  and attached support may be restricted by at least one degree of freedom. 
     In other implementations, one side of the support arbors are flat and configured to engage with corresponding portions of the exterior cap recesses whereby rotation of the support arbors and attached support may be limited at a predetermined position. In other implementations, the support arbors have enlarged distal ends disposed in the exterior cap recesses and configured to engage with a portion of the exterior cap recesses, whereby the lateral movement of one or more supports is limited with respect to the cap. In other implementations, the supports include partial spherical projections disposed on an interior perimetric face of the supports and configured for engaging with the top of the cap and/or corresponding partial spherical recesses disposed in the exterior perimetric face of the cap, the partial spherical projections providing a mechanism for indexing the supports in one or both of a retained and deployed position. In other implementations, one or more longitudinally extending recesses disposed on the exterior perimetric face of the cap above one or more exterior cap recesses are configured to receive an interior portion of one or more supports, releasably indexing the supports in a deployed position. In other implementations, a recess disposed in the exterior perimetric face of the cap and extending radially inward is configured to receive and engage an interior portion of one or more supports, releasably indexing the supports in a retained position. In other implementations, one or more supports is attached to the cap via one or more fasteners (e.g., see  FIGS.  18 B- 18 C ). In other implementations, two supports are connected to the cap and each other via one or more fasteners (e.g., see  FIGS.  17 A- 17 C ). In other implementations, one continuous support arbor connects each distal end of one or more supports. 
     As shown in  FIGS.  4 A- 4 H , in various implementations, one or more projections (e.g., projections  4024 ,  4026 ) are disposed in the exterior of the cap  4018  at opposite ends and configured to limit the movement of one or more supports (e.g., supports  4020 ,  4022 ) by at least one degree of freedom. The projections  4024 ,  4026  may limit extension of one or more supports  4020 ,  4022  away from the accessory  4010  at a predetermined angle, as shown in  FIGS.  1 - 2   . In some implementations, the projections  4024 ,  4026  include one or more features configured to limit the movement of one or more supports  4020 ,  4022  by a second degree of freedom. A pair of projection openings (e.g., see openings  4064  in  FIG.  4 D ) may be disposed in one or more sides of one or more projections  4024 ,  4026  and configured to receive a portion of the distal ends of one or more supports  4020 ,  4022 , the projections restricting lateral movement of the supports away from the accessory  4010 . One or more projections may be permanently or detachably attached to the cap  4018  (e.g., see projections  18024 ,  18026  in  FIG.  18 A ). In some implementations, one or more supports may be detachably attached to one or more projections via fasteners, (e.g., see projections  18024 ,  18026  and supports  18020 ,  18022  in  FIGS.  18 E- 18 F ). 
     In some implementations, one or more projections  4024 ,  4026  may be arc-shaped or T-shaped and have a substantially rounded or tapered exterior profile. In some implementations, the projections  4024 ,  4026  have an exterior profile generally matching the exterior profile of one or more supports (e.g., supports  4020 ,  4022 ). In other implementations, one or more projections have a shape or profile that is substantially square, rectangular, circular, triangular, or trapezoidal. 
     As shown in  FIGS.  4 D- 4 E , the projections  4024 ,  4026  may include one or more proud or recessed partial spherical projection detents  4060  disposed on an interior faces thereof and configured to engage with a corresponding proud or recessed support detent  4062  disposed on an exterior face of a distal end of one or more supports (e.g., supports  4020 ,  4022 ). The projection detents  4060  and support detents  4062  may be configured for keeping one or more support arbors  4068  centrally aligned in one or more exterior cap recesses  4058 . In some implementations, a portion of one or more support arbors extends laterally outward from an exterior face of the distal ends of one or more supports and may be received and engaged in one or more recesses disposed in a bottom interior face of one or more projections. 
     As shown in  FIGS.  4 A- 4 E , one or more retaining protrusions  4066  extending radially outward from the exterior perimeter of the cap  4018  may be configured to selectively engage and retain one or more supports (e.g., supports  4020 ,  4022 ) in a retracted position. The retaining protrusions  4066  may be permanently or detachably attached to the cap  4018 . In some implementations, one or more retaining protrusions may be attached to the cap  4018  via one or more fasteners. One or more retaining protrusions  4066  may be substantially annular or arc-shaped. One or more retaining protrusions  4066  may have a rounded or tapered profile. The protrusions  4066  may provide a snap feature by which an interior portion of the supports  4020 ,  4022  may be engaged and the supports retained in a retracted position until they are selectively disengaged from the retaining protrusions  4066  by the user. In other implementations, one or more retaining protrusions  4066  are configured to engage with one or more recesses disposed in the interior face of one or more supports. 
     One or more components of the accessory  4010  such as the base  4016 , cap  4018 , plug  4028 , supports  4020 ,  4022 , and projections  4024 ,  4026 , may be constructed of a thermoplastic such as nylon or polypropylene, but other plastics such as PETG, ABS, Polyethylene, Polycarbonate, TPU, TPE, or some combination of one or more plastics or formable materials may also be used. In other implementations, one or more components of the accessory  4010  may be constructed of wood, metal, fiberglass, carbon fiber, Kevlar, composite materials, or from some combination of different materials. One or more components of the accessory  4010  may be made by injection molding, rotational molding, thermoforming, extruding, casting, machining, and additive or subtractive manufacturing such as  3 d printing. In some implementations where the accessory includes one or more flexible supports, the supports may be made of silicone, rubber, synthetic fabric, nylon, polyester, leather, a composite fabric, or from some combination thereof. 
       FIG.  5 A  is top perspective projected view illustrating a base  5016 , an annular-shaped attachment interface  5042  and a protective cover  5070 .  FIG.  5 B  is a top perspective view illustrating a disc-shaped attachment interface  5042  with a protective interior portion.  FIG.  5 C  is a top perspective view illustrating a base  5016  attached to an annular-shaped attachment interface  5042  with a protective interior portion.  FIG.  5 D  is a top perspective view illustrating a disc-shaped intermediate mounting pad  5072 .  FIG.  5 E  is a top perspective projected view illustrating a base  5016  attached to an intermediate mounting pad  5072  affixed to an exterior surface of a mobile device case  5073 , with two supports  5020  and  5022  disposed in a cap  5018  axially aligned with and attachable to the base  5016 . 
     Referring to  FIGS.  5 A- 5 E , in various implementations, an attachment interface  5042  is configured for permanently or detachably attaching one or both of a base  5016  and a cap  5018  to one of a housing, case  5073 , and cover for a mobile device (e.g., see mobile device  6012  in  FIG.  6 A ). The attachment interface  5042  may be permanently or detachably attached to or disposed in or on a surface of one of the base  5016 , the cap  5018 , and the mobile device housing, case  5073 , or cover thereof. In some implementations, the attachment interface  5042  includes one or more attachment elements, such as a single or double-sided adhesive layer, film, liquid, sticky gel, or nano-suction pad, or hook-and-loop fastener. The top and bottom of the attachment interface  5042  may have different mechanisms for attachment disposed thereon. The attachment interface  5042  may be pliable, or configured with a pliable substrate, such as a thin foam layer, enabling the attachment interface  5042  to conform to one or more curvatures in the surface of the mobile device, housing, case  5073 , or cover thereof. In some implementations, the attachment interface  5042  is magnetic and/or includes one or more magnetic attachment elements attached to or disposed in or on a surface thereof and is configured to attach to one or more ferrous or magnetic attachment elements attached to or disposed in or on a surface of one or more of the cap  5018 , the base  5016 , the intermediate mounting pad (e.g., see  5072  in  FIG.  5 D ), a plug, and the mobile device housing, case  5073 , and cover thereof, as shown in  FIGS.  20 F- 20 H . In some implementations, the attachment interface  5042  includes two or more attachment elements of the same or different type, such as a ferrous ring disposed between two layers of adhesive, or a polyurethane sticky gel pad disposed on the bottom of a magnetic disc, or a magnetic ring disposed between a hook-and-loop-fastener and an adhesive layer. In other implementations, two attachment elements may be configured to attach to one another, such as when one attachment element is attached to the bottom of one of the base  5016  and the cap  5018  and another attachment element is attached to the surface of the mobile device housing, case  5073 , or cover thereof. In some implementations, the attachment interface  5042  includes one or more elements made of plastic, metal, magnets, carbon fiber, PTFE, Teflon, Kevlar, wood, or other composite material. In other implementations, a low friction washer, spacer, or element is attached to or disposed in or on one of the attachment interface  5042 , the base  5016 , and the cap  5018  to reduce friction between one or more components. In other implementations, a bearing type attachment element may be disposed in or attached to one of the attachment interface  5042 , base  5016 , and cap  5018  to facilitate continuous rotation between one or more components, as shown in  FIGS.  20 D- 20 E . 
     In various implementations, the attachment interface  5042  is attached to and substantially disposed in or on the bottom of the base  5016 . In some implementations, the attachment interface  5042  is partially or substantially disposed in a first exterior base recess (e.g., see recess  4040  in  FIG.  4 C ) formed in the bottom of the base  5016 . In other implementations, the attachment interface  5042  is embedded in or partially or substantially disposed in a surface of the mobile device housing, case  5073 , or cover thereof. The attachment interface  5042  may have a profile generally conforming to the profile of the mobile device housing, case  5073 , or cover thereof. The attachment interface  5042  may be annular, circular, or have a shape generally conforming to one of the base  5016 , cap  5018 , and supports  5020 ,  5022 . An aperture  5030  may be formed in the center of the attachment interface  5042 , generally corresponding to an aperture  5030  formed in one of the base  5016  and the cap  5018 , and may be relatively larger or smaller in diameter. A protective film, backing, or cover  5070  detachably attached to an exterior surface of the attachment interface  5042 , may protect the attachment interface  5042  from unwanted adhesion or attachment prior to user installation. The protective cover  5070  may have an interior and exterior perimeter generally matching an interior and exterior perimeter of the attachment interface  5042  and may include a tabbed portion configured to be grasped between a user&#39;s finger and thumb in order to facilitate its removal from the attachment interface  5042 , as shown in  FIG.  5 A . 
     As shown in  FIGS.  5 B- 5 C , in some implementations, the attachment interface  5042  has an interior portion extending radially inward beyond the interior perimeter of the base  5016  and configured to protect the surface of one of the mobile device housing, case  5073 , or cover thereof from contact with one or both of a first annular cap protrusion and first cap engagement feature (e.g., see cap protrusion  4044  and cap engagement feature  4046  in  FIG.  4 C ). One or more portions of the attachment interface  5042  may have a mirrored, reflective, or glow-in-the-dark surface. Indicia, such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of the attachment interface  5042 , as shown in  FIGS.  5 B- 5 C . 
     As shown in  FIGS.  5 D- 5 E , in some implementations, an intermediate mounting pad (e.g., mounting pad  5072 ) is attached to a surface of the mobile device housing, case  5073 , or cover thereof. In some implementations, the intermediate mounting pad  5072  is disposed between the attachment interface and the mobile device housing, case  5073 , or cover thereof, the mounting pad  5072  configured to provide an improved attachment between the attachment interface  5042  and the mobile device housing, case  5073 , or cover thereof. The intermediate mounting pad  5072  may be annular, circular, or have a shape generally matching the shape of either the base  5016  and/or a surface of the mobile device, housing, case  5073 , or cover thereof upon which the base  5016  may be attached. The intermediate mounting pad  5072  may have a profile generally conforming to the profile of a surface of the mobile device housing, case  5073 , or cover thereof. In some implementations, an aperture may be disposed in the center of the intermediate mounting pad  5072  and may extend therethrough. 
     The intermediate mounting pad  5072  may have a top surface configured for optimizing attachment to the attachment interface  5042  and a bottom surface configured for optimizing attachment to the mobile device, housing, case  5073 , or cover thereof, the bottom of the intermediate mounting pad  5072  configured with an adhesive formulated for bonding to adhesion-resistant material surfaces such as those containing silicone, textured surfaces, or surfaces coated with an oleophobic coating. In some implementations, the intermediate mounting pad  5072  may be pliable, or configured with a pliable substrate, such as a thin foam layer, enabling the intermediate mounting pad  5072  to conform to one or more curvatures in the surface of the mobile device, housing, case  5073 , or cover thereof. In other implementations, the intermediate mounting pad  5072  is magnetic or includes one or more attachment elements attached to or disposed in a surface thereof. One or more portions of the intermediate mounting pad  5072  may have a mirrored, reflective, or glow-in-the-dark surface. In some implementations, the intermediate mounting pad  5072  includes a low-friction layer or coating disposed on the top surface thereof. In other implementations, the intermediate mounting pad  5072  includes a thermal insulating layer disposed on a top or bottom surface thereof. Indicia such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of the mounting pad  5072  as shown in  FIGS.  5 D- 5 E . 
       FIG.  6 A  is a top exploded perspective view illustrating the example accessory  6010  attached to an exterior surface of a mobile device  6012  and a plug removal feature  6074  disposed in the center of the accessory  6010 .  FIG.  6 B  is a top perspective view illustrating a plug  6028  configured with a flexible plug removal feature  6074 .  FIG.  6 C  is a top perspective view illustrating a plug  6028  configured with a rigid plug removal feature  6074 .  FIG.  6 D  is a top perspective view illustrating an example accessory  6010  attached to an exterior surface of a mobile device  6012  and a flexible plug removal feature  6074  retained between a cap  6018  and a support  6022 . 
     Referring to  FIGS.  6 A- 6 D , in various implementations, the accessory  6010  includes one or more plugs (e.g., plug  6028 ). The plug  6028  may be permanently or detachably attached to one or more components of the accessory  6010  and/or to a mobile device  6012  housing, case, or cover thereof. In various implementations, the plug  6028  augments the utility, functionality, and ornamentation of the accessory  6010 . 
     In some implementations, the plug  6028  is used to attach different accessories or tools to the accessory  6010 . In other implementations, the plug  6028  is used to mount the accessory  6010  to one or both of a mount (not shown, e.g., see  7092  in  FIG.  7 B ), and a mounting structure (not shown, e.g., see  7094  in  FIG.  7 B ). 
     In various implementations, the plug  6028  has a shape generally conforming to an aperture  6030  disposed in the center of the accessory  6010  and an exterior profile generally matching an interior profile of the accessory  6010 . In some implementations, the plug  6028  has an exterior profile that is substantially circular. The plug  6028  may be disc-shaped or ring-shaped. In other implementations, the plug has an exterior profile that is triangular, square, rectangular, or polygonal. One or more apertures or recesses may be formed in the plug  6028  and may extend therethrough, (e.g., see plugs  14028  in  FIGS.  14 B- 14 C ). In some implementations, the plug  6028  is magnetic or includes one or more attachment elements disposed therein or on a surface thereof. In other implementations, the plug is substantially thin and flat. In some implementations, the top surface of the plug  6028  is substantially co-planar with the top surface of a cap  6018  when the plug  6028  is attached to the accessory  6010 . In other implementations, the top surface of the attached plug is recessed or proud with respect to the top of the cap  6018 . In other implementations, the top of the plug is rounded. In other implementations, a portion of the top of the plug extends over a portion of the top of the cap  6018 . In other implementations, a portion of the plug is configured for engagement with the first annular cap protrusion (e.g., see protrusion  4044  in  FIG.  4 C ). In other implementations, one or more parts of the plug is extendable, collapsible, rotatable, or reversible (e.g., see  FIGS.  12 D- 12 E and  12 G ). 
     The plug  6028  may be permanently or detachably attached to one or more of an intermediate mounting pad  6072 , an attachment interface (e.g., see  5042  in  FIGS.  5 A- 5 C ), a base  6016 , the cap  6018 , and a mobile device  6012  housing, case, or cover thereof. The plug  6028  may be attached to the cap  6018  from a top or bottom side of the accessory  6010  and may be attached prior to or after attaching the base  6016  to the mobile device  6012  and/or attaching the cap  6018  to the base  6016 . The plug  6028  may be detachably attached to one or both of the base  6016  and the cap  6018  and retained therein by a friction fit or interference fit. In some implementations, one or more recesses or projections disposed in the interior perimetric face of one of the base  6016  and the cap  6018  are configured for engaging one or more corresponding recesses or protrusions disposed in the exterior perimetric face of the plug  6028  whereby the plug  6028  may be securely attached to the accessory  6010  and/or prevented from rotating independently from one of the base  6016  and the cap  6018 . In some implementations, the plug  6028  is configured for attachment to another plug. In other implementations, the plug  6028  is configured to attach to an accessory cover (e.g., see cover  11130  in  FIG.  11 G ). In other implementations, the plug includes an adjustment mechanism by which the diameter of the plug may be increased or decreased in order to adjust the fit of the plug within one or more components of the accessory, such as the base  6016 , cap  6018 . 
     As shown in  FIGS.  6 A- 6 D , the accessory  6010  may include a plug removal feature  6074  for detaching one or more plugs  6028  from the accessory  6010 . The plug removal feature  6074  may be substantially rigid or substantially flexible. The plug removal feature  6074  may be in the general form of a strap, loop, band, ribbon, or cord. In some implementations, the plug removal feature  6074  is integrally formed in one of the intermediate mounting pad  6072 , the attachment interface, the base  6016 , the cap  6018 , plug  6028 , and the mobile  6012  device housing, case, or cover thereof. In other implementations, the plug removal feature  6074  is permanently or detachably attached to a surface of one of the intermediary mounting pad  6072 , the attachment interface, the base  6016 , the cap  6018 , the plug  6028 , and the mobile device  6012  housing, case, or cover thereof by welding or an adhesive. In other implementations, one end of the plug removal feature  6074  is fixed in a recess formed in a bottom portion of one of the intermediate mounting pad  6072 , the attachment interface, the base  6016 , the cap  6018 , and the mobile device  6012  housing, case, or cover thereof, and the other unfixed end of the plug removal feature  6074  passes through a slot formed in the component and extends back across the top surface thereof. In some implementations, one or both of the top and bottom of the plug removal feature  6074  is substantially co-planar with one or both of the top and bottom of one or more of the intermediate mounting pad  6072 , the attachment interface, the base  6016 , the cap  6018 , the plug  6028 , and the mobile device  6012  housing, case, or cover thereof. 
     In some implementations, the plug removal feature  6074  is substantially thin, flat and rectangular. In other implementations, the plug removal feature has a profile generally conforming to the interior perimeter of one of the base  6016  and the cap  6018 . In some implementations, the plug removal feature  6074  includes a flexible portion configured to extend over the top of the cap  6018 . In other implementations, a recess formed in the interior perimetric face of one of the base, the cap, and an accessory cover (e.g., see cover  11130  in  FIG.  11 G ) is configured for receiving a portion of the plug removal feature  6074 . 
     As shown in  FIG.  6 A , the plug removal feature  6074  may be disposed in the center of the accessory  6010  and may extend over a portion of the cap  6018 . In other implementations, the plug removal feature  6074  is flexible and disposed in an exterior surface of the plug  6028 , a recess formed in an exterior surface of the plug  6028 , or in one or more slots formed in the plug  6028 , as shown in  FIG.  6 B . In other implementations, the plug removal feature is embedded or insert-molded in the plug  6028 . In some implementations, the plug removal feature  6074  is a rigid projection extending outward laterally and/or longitudinally from an exterior surface of the plug  6028 , as shown in  FIG.  6 C . In other implementations, the plug removal feature is an undercut formed in the top surface or outer perimetric face of the plug  6028 . In some implementations, the plug removal feature  6074  extends over the top of the cap  6018  and under one or more supports  6020 ,  6022  and may be retained therebetween, as shown in  FIG.  6 D . In other implementations, the plug removal feature is a torsional or cantilevered snap disposed in the interior perimeter of the accessory  6010  and configured to engage a portion of or engagement feature disposed on the exterior perimeter of the plug  6028 . In other implementations, the plug removal feature is a torsional or cantilevered snap disposed in the exterior perimeter of the plug  6028  and configured to engage a portion of or engagement feature disposed in the interior perimeter of the accessory  6010 . In other implementations, the plug removal feature includes a mechanism such as a wedge-shaped ejector release structure disposed beneath the plug  6028  and connected to a spring assisted push button operator disposed on an exterior of the accessory  6010 . 
       FIG.  7 A  is a top exploded perspective view illustrating the example accessory  7010  configured with multiple attachment features  7076 ,  7078 ,  7080  and multiple attachment elements  7084 ,  7086 ,  7088 .  FIG.  7 B  is a side projected view illustrating a mobile device  7012  and affixed example accessory  7010  detachably attachable to a mount  7092  and a mounting structure  7094 , the mount  7092  including an attachment feature  7082  and attachment element  7090 , and the mounting structure  7094  including two accessory engagement features  7096 , with the mobile device  7012  rotatably positioned to attach in a portrait orientation.  FIG.  7 C  is a side view illustrating a mobile device  7012  and affixed example accessory  7010  attached to a mounting structure  7094  configured with a hook-shaped accessory engagement feature  7096  whereto the accessory  7010  is attached by a support  7020  and the mobile device  7012  is rotatably positioned in a landscape orientation. 
     As illustrated in  FIGS.  7 A- 7 B , the accessory  7010  may include one or more permanently or detachably attached attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) for attaching various components of the accessory  7010  together and/or for attaching the accessory  7010  to another object, such as a mount  7092  or mounting structure  7094 . One or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be disposed in or attached to or disposed in or on an exterior or interior perimeter or surface of one or more of an intermediate mounting pad (e.g., see mounting pad  5072  in  FIG.  5 D ), an attachment interface (e.g., see attachment interface  5042  in  FIG.  5 A ), a base  7016 , a cap  7018 , an accessory cover (e.g., see feature  11076  in cover  11130  of  FIG.  11 F ), a mobile device  7012  housing, case, or cover thereof, a plug  7028 , and a mount  7092 , as shown in  FIGS.  7 A- 7 B . The attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be proud or recessed with respect to the surface in which they are disposed (e.g., see attachment feature  7082  in  FIG.  7 B ). One or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be separately formed from or substantially integrated into one or more components of the accessory  7010 . 
     In some implementations, the attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) comprise an annular, torsional, or cantilevered snap. The attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be continuous or segmented. The attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may include one or more openings or recesses configured for receiving a portion of another attachment feature or a plug removal feature (e.g., see feature  6074  in  FIG.  6 B ), as shown in  FIG.  7 A . The attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may include one or more detents configured to limit the movement of one or more other attachment features. The attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be configured to laterally or longitudinally constrain one or more other attachment features. In other implementations, the attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) comprise one or more fasteners, such as a ball-and-socket snap, a twist lock, a key slot, a slide lock, a spring clip, a hook, a suction cup, or threaded fasteners, and may operate by friction fit, interference fit, snap fit, suction, rotation, or other mechanical advantage. 
     One or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be configured for attachment to one or more other attachment features. For example, a first attachment feature  7076  may be configured for attachment to one or more of a second, third, and fourth attachment feature  7078 ,  7080 ,  7082 . The second attachment feature  7078  may be configured for attachment to one or more of the first, third, and fourth attachment features  7076 ,  7080 ,  7082 . The third attachment feature  7080  may be configured for attachment to one or more of the first, second, and fourth attachment features  7076 ,  7078 ,  7082 . The fourth attachment feature  7082  may be configured for attachment to one or more of the first, second, and third attachment features  7076 ,  7078 ,  7080 . 
     In various implementations, the accessory  7010  further includes one or more permanently or detachably attached attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) for attaching various components of the accessory  7010  together and/or for attaching the accessory  7010  to another object. One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may include one or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ). One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be attached to or disposed in or on an interior or exterior perimeter or surface of one or more of the intermediate mounting pad, the attachment interface, the base  7016 , the cap  7018 , the accessory cover, a mobile device  7012  housing, case, or cover thereof, the plug  7028 , and the mount  7092 , as shown in  FIGS.  7 A- 7 B . 
     One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be magnetic. One or more surfaces of one or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be configured with a single or double-sided fastener, such as an adhesive tape, reusable adhesive, sticky gel pad, nano-suction pad, two-part interlocking fastener, or hook-and-loop fastener. In some implementations, one or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) are embedded in or substantially integrated in one of the intermediate mounting pad, the attachment interface, the base  7016 , the cap  7018 , the accessory cover, the mobile device  7012  housing, case, or cover thereof, the plug  7028 , and the mount  7092 . 
     The attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be substantially rigid or substantially flexible. The attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may have an annular, circular, triangular, square, rectangular, or polygonal shape and may be in the general form of a disc, ring, cap, or flanged insert. One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may have a shape or profile generally matching the shape or profile of one or more of the intermediate mounting pad, the attachment interface, the base  7016 , the cap  7018 , the accessory cover, the plug  7028 , or the mount  7092 . In other implementations, one or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) has a profile generally matching an interior or exterior profile of one or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ). 
     One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be configured for attachment to one or more other attachment elements. For example, a first attachment element  7084  may be configured for attachment to one or more of a second, third, and fourth attachment element  7086 ,  7088 ,  7090 . The second attachment element  7086  may be configured for attachment to one or more of the first, third, and fourth attachment elements  7084 ,  7088 ,  7090 . The third attachment element  7088  may be configured for attachment to one or more of the first, second, and fourth attachment elements  7084 ,  7086 ,  7090 . The fourth attachment element  7090  may be configured for attachment to one or more of the first, second, and third attachment elements  7084 ,  7086 ,  7088 . In some implementations, multiple attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) are disposed in one or more components of the accessory  7010 , such as the cap  7018  (e.g., see  FIGS.  20 A- 20 B ). 
     In some implementations, one or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) are configured for engaging and retaining one or more attachment elements (e.g., elements  7084 ,  7086 ,  7088 ,  7090 ). A portion of one or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) may be configured to engage with and constrain the movement one or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) by at least one degree of freedom. One or more attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) may be permanently or detachably attached to one or more components of the accessory  7010  by magnets, friction fit, compression fit, interference fit, snap fit, rotational engagement, twist lock, slide lock, threaded fasteners, two-part interlocking fasteners, hook-and-loop fasteners, suction, or adhesive. In some implementations, one or more attachment features (e.g.,  7076 ,  7078 ,  7080 ,  7082 ) and attachment elements (e.g.,  7084 ,  7086 ,  7088   7090 ) include an opening or recess configured to receive a portion of a plug removal feature (e.g., see  6074  in  FIGS.  6 A- 6 D ). In other implementations, indicia such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of one or more attachment elements  7084 ,  7086 ,  7088 ,  7090 . 
     As illustrated in  FIGS.  7 B- 7 C , the accessory  7010  is used for attaching the mobile device  7012  to one or both of the mount  7092  and mounting structure  7094 . The mount  7092  may be permanently or detachably attached to the mounting structure  7094 . The mount  7092  may be attached to the mounting structure  7094  by magnets, friction fit, compression fit, interference fit, snap fit, rotational engagement, twist lock, slide lock, threaded fasteners, two-part interlocking fasteners, hook-and-loop fasteners, suction, or adhesive. In some implementations, the mount  7092  swivels or rotates in one or more directions with respect to the mounting structure  7094 . In other implementations, the mount  7092  is extendable or retractable with respect to the mounting structure  7094 . In other implementations, the mount  7092  is repositionable or slidable with respect to the mounting structure  7094 . In some implementations, one or more accessory engagement features  7096  are disposed in one or both of the mount  7092  and mounting structure  7094  and configured to engage with one or more of the cap  7018 , projections  7024 ,  7026 , and supports  7020 ,  7022 , as shown in  FIGS.  7 B- 7 C . 
     The accessory  7010  may detachably attach to one or both of the mount  7092  and mounting structure  7094  by magnets, friction fit, compression fit, interference fit, snap fit, rotational engagement, twist lock, slide lock, threaded fasteners, two-part interlocking fasteners, hook-and-loop fasteners, suction, or adhesive. In some implementations, one or more plugs  7028  configured for attachment to the accessory  7010  may be attached to the mounting structure  7094  and may function as the mount  7092 . In some implementations, one or more plugs  7028  include more than one type of attachment feature and/or attachment element, enabling the user to selectively attach one or both of the plug  7028  and the accessory  7010  to different types of mounting structures  7094  (e.g., see  FIGS.  12 A- 12 F ). 
     As illustrated in  FIG.  7 C , in some implementations, one or more accessory engagement features  7096  disposed in one or both of the mount  7092  and mounting structure  7094  are configured for engaging one or more supports  7020 ,  7022 . In some implementations, one or more engagement features  7096  disposed in the mounting structure  7094  are hook-shaped or include a clip or recess with a profile generally matching the profile of one or more supports  7020 ,  7022 , as shown in  FIG.  7 C . In other implementations, the accessory  7010  is attached to one or both of the mount  7092  and mounting structure  7094  by one or more attachment features (e.g.,  7076 ,  7078 ,  7080   7082 ) and/or attachment elements (e.g.,  7084 ,  7086 ,  7088 ,  7090 ). In other implementations, one or more supports  7020 , 7022  may be engaged in one or more accessory engagement features  7096  disposed in one of mount  7092  and mounting structure  7094 . In some implementations, a low friction washer or spacer is disposed between the mount  7092  and mounting structure  7094  to reduce friction between the two. In other implementations, a bearing, such as a race, roller, ultra thin, and ball bearing is disposed in between the mount  7092  and mounting structure  7094  to facilitate continuous rotation between the two. 
       FIG.  8 A  is a top view illustrating an example accessory  8010  affixed to an exterior surface of a mobile device  8012  with a first and second finger of a user&#39;s hand  8014  placed inside the aperture  8030  and engaged with an interior perimetric face  8032  of a cap  8018 , and a third finger of a user&#39;s hand  8014  engaged with the exterior perimetric face of a support  8022 .  FIG.  8 B  is a top view illustrating an example accessory  8010  affixed to an exterior surface of a mobile device  8012  with a first finger of a user&#39;s hand  8   014  inserted through and engaged with a support  8020 , a second finger of a user&#39;s hand  8014  engaged with an exterior perimetric face of a support  8022 , and a third finger of a user&#39;s hand  8014  engaged with an exterior perimetric face  8050  of a cap  8018 .  FIG.  8 C  is a top view illustrating an example accessory  8010  affixed to an exterior surface of a mobile device  8012  with a first and second finger of a user&#39;s hand  8014  inserted through and engaged with supports  8020 ,  8022  and partially disposed on a top surface of a cap  8018 , the first finger further engaged with an interior perimetric face  8032  of the cap  8018  and the second finger further engaged with an exterior perimetric face  8050  of the cap  8018 .  FIG.  8 D  is a top view illustrating an example accessory  8010  affixed to an exterior surface of a mobile device  8012  with a first and second finger of a user&#39;s hand  8014  inserted through and engaged with supports  8020 ,  8022  and partially disposed on a top surface of a cap  8018 , the first finger further engaged with an interior perimetric face  8032  of the cap  8018  and the second finger further engaged with an exterior perimetric face  8050  of the cap  8018 , the user&#39;s thumb disposed on an exterior side of the mobile device  8012  and used to rotate the mobile device  8012  and affixed base  8016  with respect to the cap  8018  and supports  8020 ,  8022  which are held in a fixed position by the first and second fingers of the user&#39;s hand  8014 . 
     As shown in  FIGS.  8 A- 8 D , in various implementations, one or more components of the accessory  8010  such as a base  8016 , a cap  8018 , a plug, and one or more supports  8020 ,  8022  provide a mechanism for engaging one or more fingers of a user&#39;s hand  8014 , a mount, a mounting structure, and an accessory engagement feature (e.g., see  FIG.  7 B ). One or more supports  8020 ,  8022  may be extended, retracted, and rotated to accommodate a variety of user preferences, interactive modalities, and use-case scenarios. Various components of the accessory  8010  are configured to work in conjunction to provide the user with an improved mechanism for mounting, holding, manipulating, and interacting with a mobile device  8012 , as further detailed in the example operations of  FIG.  10   . 
       FIG.  9 A  is a right side view illustrating an example accessory  9010  affixed to an exterior surface of a mobile device  9012  with a front edge of the mobile device  9012  disposed on a support surface (for example, a table) and a first support  9020  of the accessory  9010  extended and disposed on the support surface to position the mobile device  9012  in a first portrait orientation.  FIG.  9 B  is a left side view illustrating an example accessory  9010  affixed to an exterior surface of the mobile device  9012  with a back edge of the mobile device  9012  disposed on a support surface and a first and second support  9020 ,  9022  (second support  9022  hidden from view) of the accessory  9010  extended and disposed on the support surface to position the mobile device  9012  in a second portrait orientation.  FIG.  9 C  is a bottom perspective view illustrating an example accessory  9010  affixed to an exterior surface of a mobile device  9012  with the front edge of the mobile device  9012  positioned on a support surface and a first and second support  9020 ,  9022  of the accessory  9010  extended and disposed on the support surface to position the mobile device  9012  in a first portrait orientation.  FIG.  9 D  is a top perspective view illustrating an example accessory  9010  affixed to an exterior surface of a mobile device  9012  positioned on a support surface with a first support  9020  extended and positioned to support the mobile device  9012  in a first landscape orientation.  FIG.  9 E  is a top perspective view illustrating an example accessory  9010  affixed to an exterior surface of a mobile device  9012  and positioned on a support surface with a first and second support  9020 ,  9022  extended and positioned to support the mobile device  9012  in a second landscape orientation. 
     One or more supports  9020 ,  9022  may be extended and disposed on a substantially flat support surface to position a mobile device  9102  in one or more display orientations to optimize one or both of a user&#39;s viewing angle and interaction with the mobile device  9012 . The supports  9020 ,  9022  may be rotated around an axis of rotation (e.g., see  3034  in  FIG.  3   ) in conjunction with one of a cap  9018  and a base  9016  in order to change or adjust the display orientation of the mobile device  9012 . Furthermore, different portions of one or more supports  9020 ,  9022  may be disposed on the support surface in order to achieve different display orientations. 
       FIG.  10    illustrates example operations  10100  for using an adaptive support accessory. The example operations are, in part, supported by the illustrations of  FIGS.  7 A- 9 E . The example accessory  10100  accommodates a wide range of different interactive modalities and, therefore, a variety of different possible example operations. A description of common sequentially linked interactive modalities will be set forth along with descriptions of some other optional modalities, which together provide a non-exhaustive representation of some example operations for using the accessory  10100 . The operations making up the embodiments of the invention described herein may be performed in any order, adding or omitting operations as desired, unless explicitly claimed otherwise or a specific order is inherently necessitated by the claim language. 
     In a first example attaching operation  10102 , a user attaches a base to a surface of a mobile device housing, case, or cover thereof via a removable attachment interface. If the attachment interface includes an adhesive covered by a protective cover, the user may first remove the protective adhesive cover before attaching the base and attachment interface to the mobile device. In some implementations, such as if one or more surfaces of the mobile device is not suitable for attachment by the attachment interface, the user may attach an intermediate mounting pad to the mobile device prior to attaching the attachment interface and base. In other implementations where the base is pre-disposed or substantially incorporated in one of the mobile device case or cover thereof, a user may attach one of the case and cover to the mobile device. 
     In a second example attaching operation  10104 , a cap with one or more supports attached thereto is attached to the base. The cap is axially aligned with and positioned over the base. The cap and base are then pressed together until one or more cap engagement features are engaged with one or more corresponding base engagement features, rotatably coupling the cap and one or more attached supports to the base. In some implementations the cap may be attached to the base prior to attaching one or more attachable supports to the cap. In other implementations, one or more supports may be attached to the accessory by inserting one end of the support into an opening formed in the base and then securing it to the accessory by inserting a plug into an aperture formed in the center of the accessory. 
     Once the cap is rotatably coupled to the base, the user may decide to further adapt the accessory. In a third example attaching operation  10116 , the user may attach one or more plugs and/or attachment elements to the accessory, as illustrated in  FIG.  7 A . One or more components of the accessory may be configured with one or more attachment features or attachment elements, as shown in  FIG.  7 A . In some cases, the plug provides an additional feature or function to the accessory. For example, the plug may include one or more tools or everyday carry items the user might normally carry in their pocket separately from their mobile device, as shown in  FIGS.  13 A- 13 D . In other cases, the plug may be configured with one or more attachment features or attachment elements for attaching one or both of the plug and the accessory to another object, as shown in  FIGS.  12 A- 12 I . For example, the plug may be configured with a twist lock attachment feature for attaching the accessory to a correspondingly configured twist lock mount. In some cases, the attached plug may provide both an additional feature or function for attaching the accessory to another object. For example, the plug may be a container configured with one or more magnetic attachment elements disposed therein and configured for attachment to a magnetic mounting structure. One or more indicators disposed on an exterior surface of one of the cap, the base, the plug, and one or more supports may visually or tactilely aid the user in orienting the plug to a position in which it may be most easily or optimally attached to the accessory, as shown in  FIG.  12 C . In other examples, an accessory cover may be attached to one of the cap and the base prior to or in lieu of attaching the plug and may provide for adapting one of the cap and the base to receive and/or engage the plug, as shown in  FIGS.  11 E- 11 G . Like the plug, the accessory cover may include one or more attachment features or attachment elements configured for attaching to or engaging with another attachment feature or attachment element disposed in one or more other accessory components, mount, or mounting structure. 
     There are a variety of scenarios in which a user may decide to use the accessory to attach the mobile device to another object. In a fourth example attaching operation  10118 , the user may attach one or more of the cap, the base, and the plug to one or both of a compatible mount and mounting structure, as illustrated in  FIG.  7 B . For example, in some scenarios where one or more of the base, the cap, and the plug include one or more magnetic attachment elements and/or are configured for magnetic attachment to the mount, the user may mount the accessory and the attached mobile device by simply aligning the center of the accessory with the center of the mount. In other example scenarios where an aperture is disposed in the center of the accessory, the user may simply align the aperture in the accessory with the center of the correspondingly shaped mount and presses the accessory and the attached mobile device onto the mount. Depending on the configuration of the mount, the accessory may attach to the mount by engagement between one or more attachment features disposed in the accessory and one or more other attachment features disposed in one or both of the mount and mounting structure. In other scenarios, the accessory may be attached to the mount and/or mounting structure by engagement between one or more attachment elements disposed in the accessory with one or more other attachment elements disposed in one or both of the mount and mounting structure. 
     In some examples, one or more attachment features and attachment elements disposed in one of the intermediate mounting pad, the attachment interface, the base, the cap, the plug, and the mobile device housing, case, and cover thereof, may be selectively or rotatably engaged with one or more other attachment features and/or attachment elements disposed in one or both of the mount and the mounting structure. In some implementations, such as when the accessory is attached to one or both of the mount and the mounting structure by twist lock or correlated magnetic force (as may be imparted through one or more correlated magnets disposed in one or more components of the accessory and one or both of the mount and mounting structure), the user may selectively rotate one or more of the accessory, the mobile device, or the mount to disengage the accessory from the mount or the mounting structure. In other implementations, the user may rotate one or more of the accessory, the mobile device, or the mount in order to securely latch or engage one or more attachment features and/or attachment elements disposed in the mount with one or more attachment features and/or attachment elements disposed in the accessory. In other implementations, the user may attach the accessory to one of the mount and the mounting structure by aligning the accessory between one or more accessory engagement features disposed in one of the mount and the mounting structure and pressing the accessory into and/or between the accessory engagement features, as illustrated in  FIG.  7 B . 
     There are a variety of examples in which the user may use the accessory to attach the mobile device to one or both of the mount and the mounting structure in order to enhance the usability of the mobile device. In one example, the mount and/or the mounting structure may be connected to a dash of a vehicle, to which the user may attach the accessory and the mobile device, enabling the mobile device to be used as a navigational aid. In other examples, the mount and/or the mounting structure may be connected to the handlebars of a bicycle or a flexible band configured for attachment to a part of the user&#39;s body in order to provide more accessible navigational information or fitness tracking information to the user. In another example, the mount and/or the mounting structure may be configured with an inductive charger which may be incorporated into a display stand in order to charge a battery disposed in the mobile device and/or position the mobile device in a preferred display orientation. 
     There are also a variety of situations in which the user may desire to improve their handling or operation of the mobile device. The accessory supports different types of user engagements and is adaptable to different situationally based user preferences. In some situations, such as when the user expects to interact with the mobile device for a brief period of time, the user may prefer a more expedient type of support engagement, without having to deploy one or more supports. In a fifth example engaging operation  10120 , a user may engage one or more fingers of a user&#39;s hand with one or both of an interior and exterior perimetric face of the accessory. For example, the user may place one or more fingers of the user&#39;s hand inside the aperture formed in the center of the accessory and against the interior perimetric face of one of the base and the cap. In another example, the user may position one finger of the user&#39;s hand adjacent to the exterior perimetric face of a first retained support and position another finger of the user&#39;s hand on an opposite side of the accessory adjacent to the exterior perimetric face of a second retained support, gripping the accessory between the first and second fingers. In another example, the user may engage one or more fingers of the user&#39;s hand with the interior perimetric face of one of the base and the cap and engage one or more other fingers with the exterior perimetric face of one or more retained supports, as illustrated in  FIG.  8 A . 
     In other situations, such as when the user expects to interact with the mobile device for a longer period of time, the user may prefer a more secure type of support engagement with one or more extended supports, in which case the user may need to extend one or more of the supports prior to engagement. In a sixth example extending operation  10106 , the user may extend one or more supports from a retained position to a deployed position using one or more fingers of the user&#39;s hand. In an example single-handed extending operation, the user may deploy one or more supports using one or more fingers of the user&#39;s hand while holding the mobile device between the user&#39;s thumb and one or more other fingers of the user&#39;s hand. Alternatively, the user may hold the mobile device in one of the user&#39;s hands and use one or more fingers of the user&#39;s other hand to deploy one or more of the supports. In some example extending operations, such as where one or more rigid arc-shaped supports are connected to the cap and retained in a retracted position by engagement with one or more retaining protrusions disposed on the outer perimetric face of the cap, the user may place the tip of one or more fingers of the user&#39;s hand adjacent to the bottom exterior perimeter of one or more of the supports and apply inward or upward pressure against the supports in order to release them from a retained position before extending them to a deployed position. In some implementations, one or more features disposed on an exterior surface of the cap and/or one or more of the supports may visually or tactilely aid the user in orienting the accessory to a position in which one or more of the supports may be most easily or optimally deployed. In other implementations, the accessory may include a mechanism activated by either a push button or a pull tab by which one or more of the supports may be extended and/or retracted separately or simultaneously by the user. 
     In some implementations, one or more of the supports may be extended beyond a predetermined angle defined by a portion of one or more projections laterally disposed on the exterior of the cap in order to cause one or more the supports and/or support arbors to be forcibly detached from the accessory. Thus, in some implementations, one or more of the supports may be interchangeable without requiring the user to detachably separate the cap from the base. In some implementations, however, a user may also detach the cap from the base by extending one or more of the supports to a deployed position, engaging one or more fingers of the user&#39;s hand through one or more of the supports, and applying a pulling force against one or more of the supports in the direction away from the mobile device while simultaneously keeping the mobile device in a fixed position. In order to reattach the cap to the base, the user may axially align the cap over the base and apply downward pressure to the top of the cap until the first cap engagement feature fully engages with the first base engagement feature and the cap and base are rotatably coupled, as described in the first example attaching operation (e.g., see operation  10102 ). 
     In a seventh example rotating operation  10108 , the user may rotate the cap and/or one or more of the supports around the base. This rotation may aid the user in orienting one or more of the supports to an optimal position wherein one or more of the user&#39;s fingers may be most easily engaged with one or more of the extended supports. In other situations, one or more of the supports may need to be rotated prior to engaging the accessory with one or both of the mount and the mounting structure. In one example rotating operation, the user may rotate one or more of the extended supports to a particular position prior to engaging them with one or more accessory engagement features disposed in one of the mount and/or the mounting structure. 
     In an eighth example attaching operation  10122 , a user may attach one or more of the cap, the base, the plug, and one or more of the extended supports to one or both of the mount and the mounting structure. In one example attaching operation, one or more of the extended supports may be engaged with one or more compatible engagement features disposed in one or both of the mount and the mounting structure, such as the hook-shaped accessory engagement feature shown in  FIG.  7 C . In some implementations, multiple components of the accessory may be simultaneously attached to one or both of the mount and the mounting structure. For example, the cap may be attached to the mount while one or more of the supports are simultaneously attached to one or more accessory engagement features disposed in the mounting structure. 
     Once the accessory has been attached to one or both of the mount and/or the mounting structure, the user may desire to change the orientation of the mobile device with respect to one or both of the mount and/or the mounting structure. For example, the user might want to change the mobile device display orientation from portrait orientation to a landscape orientation. Thus, in a ninth example rotating operation  10124 , the user may rotate one or both of the base and the mobile device around the cap and/or one or more of the supports. In another example rotating operation, the user may rotate one or both of the mount and the mobile device in order to change the orientation of the mobile device. 
     In addition to providing improved handling, operation, and mounting of the mobile device, the accessory may also be used to position the mobile device in a preferred orientation for hands-free use as illustrated in  FIGS.  9 A- 9 E . In a tenth positioning operation  10126 , the user may position one or more extended supports on a support surface to dispose the mobile device in a preferred orientation. For example, the user may want to position the mobile device in a portrait orientation on a desk in order to better interact with the mobile device&#39;s graphical user interface. In another example positioning operation, the user may want to position the mobile device on a table in a landscape orientation optimized for watching a video on the mobile device. 
     To adjust the user&#39;s viewing angle with respect to the mobile device&#39;s display orientation, in an eleventh rotating operation  10128 , the user may rotate the cap and/or one or more of the supports around the base to change the display orientation of the mobile device. For example, a user may rotate one or more of the extended supports supporting the mobile device on a support surface in a portrait orientation as shown in  FIGS.  9 A- 9 C  to change the orientation of the mobile device to a landscape orientation, as shown in  FIGS.  9 D- 9 E . In another example rotating operation, the user may rotate one or more of the supports supporting the mobile device in a landscape orientation approximately ninety degrees in order to increase or decrease the viewing angle of the mobile device display as shown in  FIGS.  9 D- 9 E . Different mobile device orientations may be obtained depending on the size and shape of the supports, how many of the supports are extended, how the supports are oriented with respect to the mobile device, and the support surface upon which the supports are disposed. 
     In a twelfth engaging operation  10110 , the user may engage one or more fingers of the user&#39;s hand with one or more of the cap, the base, the plug, and one or more of the supports, as shown in  FIGS.  8 B- 8 C . The user may choose to dispose one or more of the supports in a variety of positions relative to one or more of the user&#39;s fingers, such as positioning an engaging portion of one or more of the supports closer or further away from the distal end of one or more fingers of the user&#39;s hand. This flexibility with regard to support placement provides for different comfort fits depending on the user&#39;s preferences and preferred methods of engagement and allows for greater reach with respect to the user&#39;s thumb in relation to the mobile device&#39;s display. Moreover, because the cap and one or more of the supports may rotate with respect to one or both of the base and the mobile device, the user&#39;s grip may easily be adjusted in order to optimize the user&#39;s interaction with the mobile device. 
     For example, in one example engaging operation, the user may place one or more fingers of the user&#39;s hand underneath and adjacent to one or more fully extended supports, using the support as a kind of shelf to support the mobile device in one of the user&#39;s hands. In another example main engaging operation, the user may place one side of the mobile device in the palm of the user&#39;s hand, and grip around the exterior of the support disposed on the opposite side of the mobile device with one or more fingers of the user&#39;s hand. In another example engaging operation, the user may squeeze one or more of the extended supports between two or more fingers of the user&#39;s hand. 
     In various example engaging operations, the user may engage one or more fingers of the user&#39;s hand through one or more of the extended supports, which may enable the user to more securely hold and operate the mobile device single-handedly. For example, in one example engaging operation, the user may engage one of the user&#39;s fingers through one of the extended supports and position each end of the support flush against opposite sides of the user&#39;s finger such that the fingers of the user&#39;s hand may be held together comfortably in close proximity to one another in a natural position, as shown in  FIG.  8 B . In another example engaging operation, the user may engage one or more fingers of the user&#39;s hand into one or more of the extended supports with the back of the user&#39;s fingers disposed adjacent to the top of the cap such that the mobile device is positioned toward the back of the user&#39;s hand. This type of engagement can be convenient insofar as it leaves the fingers of the user&#39;s hand substantially free to engage with other objects, such as holding a cup or carrying a bag, while simultaneously enabling the user to maintain a secure grip on the mobile device. In another example engaging operation, the user may engage one or more fingers of the user&#39;s hand through one or more of the extended supports and also simultaneously engage one or more fingers with one or both of an interior and exterior perimetric face of one or more of the cap, the base, and the mobile device, as shown in  FIG.  8 C . In this type of engagement, the user is able to maintain a secure hold of the mobile device while dynamically adjusting the position of the user&#39;s hand with respect to the mobile device, optimizing the distance the user&#39;s thumb is able to reach with respect to the exterior perimeters of the mobile device&#39;s display. 
     In a thirteenth rotating operation  10112 , the user may rotate one or both of the base and the mobile device around the cap and/or one or more of the supports. For example, the user may engage one or more fingers of the user&#39;s hand through one or more of the supports and use another finger or thumb of the user&#39;s hand to rotate the mobile device around the axis of rotation with respect to one or both of the cap and the base, as shown in  FIG.  8 D . This type of engagement allows the user to easily and securely hold the mobile device single-handedly while dynamically manipulating its display orientation. The user may easily manipulate the mobile device between different display orientations by rotating the mobile device in either direction with one or more unengaged fingers. This flexibility provides the user with a high degree of operational dexterity to manipulate the mobile device while enabling the user to maintain a secure grip on the mobile device. For example, the user may have one or more fingers engaged through one or more of the supports with the mobile device positioned in a preferred portrait display orientation to interact with the mobile device&#39;s graphical user interface, then rotate the device to a preferred landscape display orientation using one or more fingers of the same or opposite hand to capture a picture or record a video using the mobile device&#39;s camera, before rotating the mobile device back to a preferred portrait orientation to further interact with the mobile device&#39;s graphical user interface. In another example rotating operation, the user may have one or more fingers of the user&#39;s hand engaged through one or more of the supports and then rotate the mobile device and the base around the cap and one or more of the supports using the thumb or one or more fingers of the same or opposite hand. In this way, the accessory may provide the user with kinetic amusement, as it enables the user to simultaneously hold and repeatedly rotate the mobile device around the axis of rotation with respect to the cap. 
     In a fourteenth retracting operation  10114 , the user may retract one or more of the extended supports from a deployed position to a retained position using one or more fingers of the user&#39;s hand. In some implementations, the user may press one or more of the extended supports in the direction of retraction using one or more fingers of the user&#39;s hand until either the supports are engaged by one or more retaining protrusions disposed in the exterior perimetric face of the cap or until the support is no longer movable with respect to one of the cap and the base. The user would typically perform this operation when preparing the mobile device and the attached accessory for transport or personal conveyance. In other scenarios, a user may retract one or more extended supports prior to attaching the accessory to one or both of the mount and the mounting structure or before placing the accessory flat on the support surface. In some implementations, such as where one or more of the supports are flexible, the user may apply pressure to the support in a direction opposite the direction of retraction and beyond the position normally arrested by one or more of the cap projections, imparting tension or spring forces in the support which, when released, may be sufficient to cause the support to move in the opposite direction and retract to a retained position. In other implementations, one or more of the supports may be retracted separately or simultaneously via a support retraction mechanism disposed in or attached to the accessory. 
       FIG.  11 A  is a top perspective exploded view of a disc-shaped accessory cover  11130  attachable to the top of a plug  11028 .  FIG.  11 B  is a bottom perspective view of a disc-shaped accessory cover  11130  attached to the top of a plug  11028 .  FIG.  11 C  is a top perspective exploded view of a disc-shaped accessory cover  11130  attachable to the top of a cap  11018 .  FIG.  11 D  is a top perspective exploded view of a ring-shaped accessory cover  11130  attachable to the top of a cap  11018 .  FIG.  11 E  is a top perspective sectional view of a flanged accessory cover  11130  with an aperture disposed in the center and a partially enclosed bottom.  FIG.  11 F  is a top perspective sectional view of a flanged accessory cover  11130  with an aperture disposed in the center and an enclosed bottom.  FIG.  11 G  is a top perspective sectional view of a flanged accessory cover  11130  with an aperture disposed in the center and a recess disposed in an interior perimetric face. 
     As illustrated in  FIGS.  11 A- 11 G , in some implementations, an accessory cover  11130  may be permanently or detachably attached to an exterior surface of one or more of a cap  11018 , a plug  11028 , and a base (not shown, e.g., see base  4016  in  FIG.  4 D ). The accessory cover  11130  may be substantially flat and thin. The top of the cover  11130  may be flat, as shown in  FIG.  11 E  or sloped at an angle, as shown in  FIG.  11 F . The accessory cover  11130  may be disc or ring-shaped. The accessory cover  11130  may have an interior and exterior perimeter generally matching the interior and exterior perimeters of one or more of the cap  11018 , the base  11016 , and the plug  11028 . In some implementations, the accessory cover  11130  extends beyond one or both of the interior or exterior perimetric face of one or more of the cap  11018 , the base  11016 , and the plug  11028 , as shown in  FIG.  11 B . In other implementations, the accessory cover  11130  is flanged and is configured to cover at least a portion of both the top exterior surface of the cap  11018  and the interior perimetric face of one or both of the cap  11018  and the base  11016 , as shown in  FIGS.  11 E- 11 G . 
     In some implementations, the top of one or both of the plug  11028  and the cap  11018  includes a recess configured for receiving and/or engaging a portion of the accessory cover  11130 . In some implementations, an aperture  11030  is formed in the center of the accessory cover  11130  and may be of a dimension similar to an aperture  11030  formed in one of the cap  11018 , the base  11016 , and the plug  11028 , as shown in  FIGS.  11 B and  11 D . In some implementations, the aperture  11030  formed in the center of the accessory cover  11130  may extend therethrough. In other implementations, the bottom surface of the accessory cover  11130  is enclosed, as shown in  FIG.  11 F . In other implementations, the bottom surface of the accessory cover  11130  is partially enclosed, as shown in  FIG.  11 E . In some implementations, one or more continuous or segmented annular features are disposed around the interior perimetric face of the accessory cover  11130  circumscribing the aperture  11030  and may protect a surface of a mobile device (not shown) from contact with an attachable plug  11028 . In other implementations, one or more attachment features and/or attachment elements are disposed in the accessory cover  11130 , such as a twist lock first attachment feature  11076  disposed around the interior perimetric face of the accessory cover  11130 , as shown in  FIG.  11 F . In other implementations, one or more recesses disposed in the interior perimetric face of the accessory cover  11130  may be configured to receive a portion of one or both of a lateral projection disposed in an outer surface of the plug  11028  and a plug removal feature (e.g. see  6074  in  FIG.  6 A ). 
     In some implementations, the accessory cover  11130  has one of an adhesive or nano-suction pad disposed on one or more surfaces configured for attachment to one of the base  11016 , the cap  11018 , and the plug  11028 . In other implementations, the accessory cover  11130  attaches to one of the cap  11018  and the base  11016  by a friction or interference fit. In some implementations, the accessory cover  11130  is magnetic and may attach to one of the plug  11028 , the base  11016 , and the cap  11028  magnetically. The accessory cover  11130  may be rigid or flexible. The accessory cover  11130  may be made of plastic, vinyl, paper, rubber, silicone, wood, metal, carbon fiber, or other composite material. In some implementations, the accessory cover  11130  includes one or more proud or recessed ornamental design features. In some implementations, the accessory cover is a sticker. Indicia, such as a name, logo, slogan, trademark, or service mark representing one or more of a business, product, or person may be disposed on, across, or around one or more surfaces of the accessory cover  11130 . 
       FIG.  12 A  is a top perspective view of a plug  12028  configured with a twist lock attachment feature  12078  and an attachment element  12086  disposed in a top interior surface of the plug  12028 .  FIG.  12 B  is a top perspective view of a plug  12028  with an attachment feature  12078  configured for attachment to an expandable grip support.  FIG.  12 C  is a top view of a plug  12028  and a cap  12018  with alignment indicators  12134  disposed on a top surface thereof for aligning an attachment features  12078  disposed in the plug with an attachment feature  12076  disposed in the cap  12018 .  FIG.  12 D  is a top perspective view of a plug  12028  with a selectively rotatable center portion configured with different attachment elements  12086 ,  12088  disposed on opposite faces thereof.  FIG.  12 E  is a top perspective sectional view of a plug  12028  with a selectively attachable and reversible center portion configured with different attachment elements  12086 ,  12088  disposed on opposite faces thereof.  FIG.  12 F  is a top perspective view of a plug  12028  with a magnetic attachment element  12086  configured with a plug removal feature  12074  and disposed in a recess formed in the bottom an attachment feature  12078 .  FIG.  12 G  is a top perspective view of a plug  12028  with two selectively rotatable attachment features  12078 ,  12080 , showing the attachment features in both a retracted position and a retained position.  FIG.  12 H  is a top perspective view of a plug  12028  with a rotatable center portion and an attachment element  12086  disposed therein.  FIG.  12 I  is a top perspective view of a plug  12028  with a threaded attachment feature  12078  and a flanged bottom configured for attachment under a cap  12018 .  FIG.  12 J  is a top perspective view of a plug  12028  configured with an attachment hole  12137  and a plug removal feature  12074  and disposed in a plug receptacle  12136 . 
     In various implementations, one or more attachment features (e.g.,  12076 ,  12078 ,  12080 ) and/or attachment elements (e.g.,  12086 ,  12088 ) may be attached to or disposed in or on an interior or exterior surface of one or more components of the accessory such as a plug (e.g., plug  12028 ) and a cap (e.g., cap  12018 ). In some implementations, one or more attachment features (e.g., feature  12078 ) or attachment elements (e.g., element  12086 ) operate by rotational engagement and may include one or more stops or detents for engaging and/or inhibiting the rotation of one or more other attachment features or attachment elements at one or more predetermined positions, as shown in  FIG.  12 A . In other implementations, one or more attachment features (e.g., feature  12078 ) or attachment elements (e.g., element  12088 ) may be configured for attachment to a second mobile accessory or support such an expandable grip or knob, as shown in  FIG.  12 B . In some implementations, the plug  12028  includes one or more recesses disposed in one or both of the top and bottom of the plug  12028  configured for receiving one or more attachment elements (e.g., elements  12086 ,  12088 ), as shown in  FIGS.  12 A- 12 B . In some implementations, one or more alignment indicators  12134  may be disposed on one or more surfaces of one or more of a base, the cap  12018 , the plug  12028 , a mount, and a mounting structure, and may aid the user in aligning one or more attachment features (e.g., feature  12078 ) with respect to one or more other attachment features (e.g., feature  12076 ), as shown in  FIG.  12 C . 
     In some implementations, two or more attachment features (e.g., features  12078 ,  12080 ) and/or attachment elements (e.g., elements  12086 ,  12088 ) are disposed in the plug  12028 , as shown in  FIGS.  12 D and  12 G . In some implementations, two or more attachment elements (e.g.,  12086 ,  12088 ) are attached to the plug  12028  and may be disposed on the same side or on opposite sides of the plug  12028 . As shown in  FIGS.  12 D- 12 E , the plug  12028  may include two or more attachment features and/or attachment elements (e.g., elements  12086 ,  12088 ) disposed on one or more faces of a detachably attachable or selectively rotatable center portion. This configuration provides the user with the ability to selectively attach the plug  12028  to different types of mounts and mounting structures. In other implementations, one or more attachment elements (e.g., element  12086 ) may include a substantially rigid or substantially flexible removal feature (e.g., feature  12074 ), which may enable the user to detach one or both of the attachment element  12086  and the plug  12028  from another accessory component, as shown in  FIG.  12 F . 
     As shown in  FIG.  12 G , in other implementations, one or more attachment features (e.g., features  12078 ,  12080 ) or attachment elements may articulate, rotate, or extend outward from a retracted position to a deployed position, providing a mechanism for attaching one or more accessory components such as the plug  12028  to another accessory component or to one or both of the mount and the mounting structure, such as a vehicle air vent. In other implementations, the plug  12028  includes a rotatable center portion with an attachment element (e.g., element  12086 ) disposed on a top surface thereof, the center portion of the plug  12028  configured to freely rotate with respect to a fixed outer plug portion and enabling a second mobile accessory or support attached to the rotatable attachment element  12086 , such as an expandable grip, to freely rotate, as shown in  FIG.  12 H . In other implementations, one or more attachment features (e.g., feature  12078 ) or attachment elements may include one or more threaded fasteners, as shown in  FIG.  12 I . In some implementations, the plug  12028  includes a continuous or segmented flange extending radially outward from the bottom exterior perimeter of the plug  12028 , as shown in  FIG.  12 I . The flange  12135  may be disposed underneath a portion of the cap  12018  such as a first annular cap protrusion, wherein movement of both the flange  12135  and the plug  12028  may be longitudinally restricted and whereby the plug  12028  may be secured to the cap  12028 . 
     In other implementations, one or more plugs  12028  may be disposed in a plug receptacle (e.g., receptacle  12136 ), as shown in  FIG.  12 J . The top of the plug receptacle  12136  may include a recess configured for receiving the plug  12028  and removal feature  12074  attached thereto, and a bottom surface configured for attachment to a mobile device housing, case, or cover thereof. The plug receptacle  12136  and the accessory may be concurrently attached to a surface of the mobile device housing, case, or cover thereof. One or more plugs  12028  may be interchangeably attached and detached from the plug receptacle  12136  and the accessory, facilitating simultaneous attachment of multiple plugs to the mobile device housing, case, or cover thereof, and enabling a user to selectively adapt the accessory with the plug  12028  that best suits a particular application. One or more attachment holes  12137  disposed in one or both of the plug  12028  and the plug receptacle  12136  and extending therethrough may be configured for attachment to another object, such as a key ring or a lanyard. 
       FIG.  13 A  is a top perspective view of a plug  13028  configured with an extendable and retractable knife and bottle opener.  FIG.  13 B  is a top perspective view of a plug  13028  configured with a rotatably extendable and retractable bottle opener and box cutter.  FIG.  13 C  is a top perspective view of a plug  13028  container configured with a hinged lid and a magnetic closure.  FIG.  13 D  is a top perspective view of a plug  13028  configured with a rotatably extendable and retractable key. 
     In various implementations, one or more plugs  13028  include one or more features or components for accessorizing a mobile device or for providing additional utility to a user. In some implementations, the plug  13028  includes an extendable or rotatable tool such as a knife or bottle opener as shown in  FIGS.  13 A- 13 B . In some implementations, the plug  13028  includes one or more features for locking one or more extendable plug components in an extended or retracted position. In other implementations, the plug  13028  comprises a container with a lid that is hinged, rotatable, or removable, the container including one or more recesses configured for receiving and retaining one or more objects a user may find desirable to convey with a mobile device such as hearing aid batteries, breath mints, a pair of earbuds, or lip balm, as shown in  FIG.  13 C . In some implementations, the plug  13028  includes other linearly or rotatably extendable and retractable implements or tools, such as a key, as shown in  FIG.  13 D . 
     The aforementioned plugs  13028  are just a representational sample of the types of accessories that may be included in one or more plugs  13028 . Other examples of accessories that may be disposed in or attached to one or more plugs  13028  include, but are not limited to: tools such as knives, wrenches, screw drivers, pliers, tape measures, scissors, box cutters, wire strippers, letter openers, keys, smoking pipes, cigar cutters, lighters, fire starters, hand crank chargers, compasses, whistles, writing pads, writing instruments, personal care items such as makeup applicators, tweezers, nail files, mirrors, electronic accessories such as LED lights, laser pointers, flash storage devices, memory cards, hard drives, clocks, cameras, camera flashes, adapters, cable interfaces, connector interfaces, projectors, printers, identification tags, authorization devices, vaporizers, batteries, speakers, headphones, geo-spatial location tags, radios, microphones, Bluetooth devices, wi-fi enabled devices, cellular radio enabled devices, scanners, smart watches, smart watch connectors, hearing aids, augmented reality glasses, lamps, fans, control devices such as remote controls, game controllers, keyboards, robotic mechanisms, programmable function controllers, camera shutter controllers, computer input control devices, computer peripherals, headset control devices, sensors such as motion sensors, altimeters, barometers, wind direction sensors, weather sensors, spectrometers, chemical sensors, particulate sensors, oxygen monitors, pulse oximeters, glucose monitors, infrared fat monitors, pressure sensors, weight sensors, electrophysiology sensors, hygrometer, thermometer, electrocardiography sensors, health monitors, heart rate monitors, breathalyzers, breath monitors, vibrators, massage paddles, recording devices such as audio recording devices, video recording devices, image recording devices, optical devices such as camera lenses, magnifying glasses, monocles, bifocals, prisms, periscopes, containers for containing and dispensing things such as makeup, moisturizer, lip balm, liquid, perfume, hand sanitizer, viral testing kits, aromatherapy pods, cleaning pads, condoms, breath mints, gum, pills, earbuds, headphones, hearing aid batteries, dental floss, guitar picks, ball markers, toys and games such as tops, mazes, fidget toys, spinners, gyroscopes, drones, musical instruments, mounts such as surface attachment mechanisms, magnetic mounts, suction cup mounts, nano suction pad mounts, wall mounts, vehicle mounts, bike mounts, armband mounts, wristband mounts, headband mounts, and attachment supports such as straps, loops, bands, grips, extendable socket grips, kickstands, clips, tri-pods, extendable selfie sticks, lanyards, and keyrings, among many others. 
       FIG.  14 A  is a top perspective view of an example accessory  14010  including a plug  14028  and a cap  14018  configured with corresponding design elements.  FIG.  14 B  is a top perspective view of an example accessory  14010  with a circular aperture  14030  disposed in the center of a plug  14028  and extending therethrough.  FIG.  14 C  is a top perspective view of an example accessory  14010  with a heart-shaped aperture  14030  disposed in the center of a plug  14028 .  FIG.  14 D  is a top perspective view of an annular-shaped example accessory with an aperture  14030  disposed in the center of a cap  14028 .  FIG.  14 E  is a top perspective view of a substantially square-shaped example accessory  14010 .  FIG.  14 F  is a top perspective view of a substantially rectangular-shaped example accessory  14010 .  FIG.  14 G  is a top perspective view of a substantially circular-shaped example accessory  14010  with two flat sides disposed opposite one another.  FIG.  14 H  is a top perspective view of a substantially oblong-shaped example accessory  14010 .  FIG.  14 I  is a top perspective view of a substantially hexagonal-shaped example accessory  14010 .  FIG.  14 J  is a top perspective view of an example accessory  14010  including a substantially polygonal-shaped cap  14018 .  FIG.  14 K  is a top perspective view of a substantially heart-shaped example accessory  14010 .  FIG.  14 L  is a top view of an example accessory  14010  with a shape and ornamentation depicting a fictional creature. 
     In some implementations, corresponding design elements may be disposed in one or both of an interior and exterior surface of a plug  14028  and a cap  14018 , as shown in  FIG.  14 A . One or more apertures  14030  disposed in the accessory  14010  may be one of a variety of different shapes or symbols. For example, circles, stars, and hearts are just three of a variety of different shapes and symbols that may be formed in the accessory  14010 , as shown in  FIGS.  14 A- 14 D . In some implementations, one or more apertures  14030  disposed in a surface of one or more of a base  14016 , the cap  14018 , and the plug  14028  may be fully or partially enclosed as shown in  FIG.  14 C  or may extend therethrough, as shown in  FIGS.  14 B- 14 D . One or more shapes or symbols disposed in one or both of the plug  14028  and the cap  14018  may be proud or recessed. 
     One or both of the interior and exterior perimeters of the accessory  14010  may resemble one of a variety of different shapes or symbols. In some implementations, the accessory  14010  has a circular or annular shape that may resemble a real-world object such as a wheel or a donut, as shown in  FIG.  14 D . In other implementations, the shape of the accessory  14010  is substantially square or rectangular shaped, as shown in  FIGS.  14 E- 14 F . In other implementations, the accessory  14010  is substantially circular shaped with two flat sides disposed opposite one another, as shown in  FIG.  14 G . In some implementations, the accessory  14010  has a shape that is substantially oval or oblong, as shown in  FIG.  14 H . In other implementations, the accessory  14010  has a shape that is substantially hexagonal, as shown in  FIG.  14 I . In other implementations, the accessory  14010  has as shape that is substantially triangular, or polygonal. 
     In some implementations one or more supports (e.g., supports  14020 ,  14022 ) has a shape and profile substantially conforming to the shape and profile of one or both of the base  14016  and the cap  14018 , as shown in  FIGS.  14 A- 14 K . In other implementations, one or both of the cap  14018  and the base  14016  may have an inner or outer perimeter that differs from the inner or outer perimeter of one or more supports (e.g., supports  14020 ,  14022 ), as shown in  FIG.  14 J . One or more corners or edges of the accessory  14010  may be sharp or rounded. In some implementations, the aperture  14030  formed in the center of the accessory  14010  has a shape generally matching the outer perimeter of the accessory  14010 . In other implementations, the aperture  14030  may have a shape that is substantially triangular, circular, square, rectangular, or polygonal, as shown in  FIG.  14 J . 
     In some implementations, the accessory  14010  has a shape resembling a symbol, logo, emblem, or icon, such as a heart, as shown in  FIG.  14 K . Other possible accessory  14010  shapes may be representations that include, but are not limited to: flowers, plants, human forms, heads, sporting equipment, imaginary creatures, fictional characters, cartoon figures, animals, fish, insects, birds, vegetables, fruits, and vehicles, among others. In various implementations, one or more features or shapes extend laterally or protrude longitudinally from one or more of the base  14016 , the cap  14018 , the plug  14028 , the projections  14024 ,  14026 , and the supports  14020 ,  14022 , and may provide additional functionality or ornamentation to the accessory  14010 , as shown in  FIG.  14 L . In some implementations, the accessory includes corresponding design elements disposed in two or more of the base  14016 , the cap  14018 , the plug  14028 , the projections  14024 ,  14026 , and the supports  14020 ,  14022 , as shown in  FIG.  14 L . 
       FIG.  15 A  is a top perspective view of a base  15016  with a bottom portion extending radially inward and outward from a first annular base protrusion  15036  and an aperture  15030  formed in the center of the base  15016 .  FIG.  15 B  is a top perspective sectional view of a cap  15018  with an enclosed bottom center portion extending radially inward from a first annular cap protrusion  15044 .  FIG.  15 C  is a bottom perspective view of a cap  15018  with an enclosed top center portion extending inward from a first annular cap protrusion  15044 .  FIG.  15 D  is a top perspective view of a cap  15018  with an enclosed top center portion.  FIG.  15 E  is a top perspective sectional view of a cap  15018  with a fourth annular cap protrusion  15138 .  FIG.  15 F  is a top perspective sectional view of an example accessory  15010  with a base  15016  and a cap  15018 , each configured with a pair of corresponding engagement features  15038 ,  15144 , and  15046 ,  15142 . 
     In some implementations, the bottom of a base (e.g., base  15016 ) extends radially inward from a first annular base protrusion  15036  and may fully or partially enclose the center of the base  15016 , as shown in  FIG.  15 A . In other implementations, the bottom of the base  15016  extends inward from the first annular base protrusion  15036  and the flanged portion extending outward from the first annular base protrusion  15036  is omitted. In some implementations, a portion of a cap (e.g., cap  15018 ) extends radially inward from the bottom of the first annular cap protrusion  15044  and fully or partially encloses the bottom center portion of the cap  15018 , as shown in  FIG.  15 B . In other implementations, a portion of the cap  15018  extends radially inward from the top of the first annular cap protrusion  15044  and fully or partially encloses the top center portion of the cap  15018 , as shown in  FIGS.  15 C- 15 D . 
     In some implementations, the cap  15018  includes a fourth annular cap protrusion  15138 , as shown in  FIG.  15 E . The fourth annular cap protrusion  15138  may be located interior to the first annular cap protrusion  15044  separated by a third interior cap recess  15140  and may circumscribe an aperture  15030  formed in the center of the cap  15018 . 
     The fourth annular cap protrusion  15138  may define the interior perimetric face of the cap  15018  and may be configured for receiving a plug. In some implementations, the cap  15018  extends radially inward from the fourth annular cap protrusion  15138  and may fully or partially enclose the top or bottom center of the cap  15018 . In other implementations, the cap  15018  includes only the first and second annular cap protrusions  15044 , 15048  and one or both of a third and the fourth annular cap protrusions  15054 ,  15138  are omitted. 
     In some implementations, the cap  15018  and the base  15016  include multiple corresponding engagement features  15046 ,  15142 , and  15038 ,  15144 , as shown in  FIG.  15 F . In some implementations, the cap  15018  may include a first cap engagement feature  15046  disposed on a first annular cap protrusion  15044  and a second cap engagement feature  15142  disposed on a third annular cap protrusion  15054 . The base  15016  may include a first base engagement feature  15038  disposed on a first annular base protrusion  15036  and a second base engagement feature  15144  disposed on a second annular base protrusion  15146 , as shown in  FIG.  15 F . In some implementations, one or more attachment elements are disposed on top of the base  15016  around the first base protrusion  15038  or in between the first and second annular base protrusions  15036 ,  15146 . 
       FIG.  16 A  is a top perspective sectional view of an example accessory  16010  with an outward extending base engagement feature  16038  and an inward extending cap engagement feature  16046 .  FIG.  16 B  is an enlarged sectional view of  FIG.  16 A  showing an outward extending base engagement feature  16038  disposed on an exterior face of a first annular base protrusion  16036  and an inward extending cap engagement feature  16046  disposed on an interior face of a third annular cap protrusion  16054 .  FIG.  16 C  is a top perspective sectional view of an example accessory  16010  with an outward extending base engagement feature  16038  disposed on an exterior face of a first annular base protrusion  16036  and an inward extending cap engagement feature  16046  disposed on an interior face of a first annular cap protrusion  16044 .  FIG.  16 D  is a top perspective sectional view of an example accessory  16010  with a top interior portion of a cap extending inward over a first annular base protrusion  16036 .  FIG.  16 E  is a top perspective sectional view of an example accessory  16010  with three base components  16148 ,  16150 ,  16152 .  FIG.  16 F  is a top perspective sectional view of an example accessory  16010  with two base components  16148 ,  16150 .  FIG.  16 G  is a top perspective assembly view of an example accessory  16010  with two base components  16148 ,  16150  and an accessory cover  16130  attached to a cap  16018 .  FIG.  16 H  is a top perspective view of an example accessory  16010  with two cap components  16154 ,  16156  and two base components  16148 ,  16150  (not shown).  FIG.  16 I  is a top perspective sectional view of  FIG.  16 H .  FIG.  16 J  is a top perspective assembly view of  FIG.  16 H . 
     As shown in  FIGS.  16 A- 16 B , in some implementations, a first base engagement feature  16038  extends radially outward from an exterior face of a first annular base protrusion  16036  and is configured to engage with a first cap engagement feature  16046  extending radially inward from an interior face of a third annular cap protrusion  16054 . In other implementations, the first base engagement feature  16038  extends radially outward from an exterior face of the first annular base protrusion  16036  and is configured to engage with the first cap engagement feature  16046  extending radially inward from an interior face of the second annular cap protrusion  16048  (e.g., see  FIGS.  19 K- 19 L . In other implementations, the first base engagement feature  16038  extends radially outward from a first annular base protrusion  16036  is configured to engage with a first cap engagement feature  16046  extending radially inward from a first annular cap protrusion  16044 , as shown in  FIG.  16 C . In some implementations, an inner portion of a cap  16018  extends radially inward from the first annular cap protrusion  16044  and covers a portion of one or both of the first annular base protrusion  16036  and the first base engagement feature  16038 , as shown in  FIGS.  16 C- 16 D . In some implementations, the portion of the cap  16018  extending over the first annular base protrusion  16036  may be a separately formed component and permanently or detachably attached to the top of the cap  16018  and may be configured to protect one or both of the first base engagement feature  16038  and the first annular base protrusion  16036  from contact with one or more of a user&#39;s fingers. 
     In various implementations, one or both of the base  16016  and the cap  16018  are constructed of two or more components. Two or more base  16016  and/or cap  16018  components may be attached together via adhesive, mechanical fasteners, hook and loop fasteners, two-part interlocking fastener system, or magnets, or may be welded together. One or more base  16016  and/or cap  16018  components may be made of plastic, metal, wood, carbon fiber, or other composite material. In some implementations, a portion of the cap  16018  is rotatably disposed between a first base component  16148  and a second base component  16150 , as shown in  FIG.  16 E . In other implementations, the first cap engagement feature  16046  is rotatably disposed between the first base engagement feature  16038  and the second base component  16150 , as shown in  FIG.  16 F . In some implementations, a third base component  16152  is disposed between the first and second base components  16148 ,  16150  and may include one or more magnets or adhesive layers for connecting the first and second base components  16148 ,  16150  together, as shown in  FIG.  16 E . In other implementations, the first  16148  and third base  16152  components are combined and form a single body. In some implementations, one or more of the first, second, and third base components  16148 ,  16150 ,  16152  are magnetic and are configured to attach to a magnetic attachment interface and/or one or more magnetic attachment elements disposed in the mobile device housing, case, or cover thereof (e.g., see attachment interface  20042  and magnetic elements  20090  in  FIGS.  20 F- 20 H . In other implementations, the bottom of the first base component  16148  is disposed in a recess formed in the top of the second base component  16150 , as shown in  FIG.  16 F . In some implementations, the top of the first base component  16148  may be flush with the top of the cap  16018 , as shown in  FIG.  16 G . In other implementations, the top of the first base component  16148  is recessed with respect to the top of the cap  16018 , as shown in  FIG.  16 E . The bottom of the second base component  16150  may be configured to receive an attachment interface for attaching the base  16016  to a surface of a mobile device housing, case, or cover thereof. In some implementations, an accessory cover  16130  is attached to the top surface of the cap  16018  and may cover a portion of the top of the first base component  16148 , as shown in  FIG.  16 G . The accessory cover  16130  may protect the top of the first base component  16148  from contact with one or more of a user&#39;s fingers. 
     As shown in  FIGS.  16 H- 16 J , the cap  16018  may also be constructed of two or more component parts. The bottom of a first cap component  16154  may be configured for attachment to the top of a second cap component  16156 . One or more supports  16020 ,  16022  may be rotatably attached to the first cap component  16154 . As shown in  FIGS.  16 J- 16 I , the first base component  16148  may include a laterally protruding outer flanged portion and a longitudinally protruding inner center portion. An annular protrusion may extend longitudinally from the top of the second base component  16150  and may circumscribe an aperture  16030  disposed in the center of the second base component  16150  and extending therethrough. A recess may be formed in the bottom of the second base component  16150  circumscribing the aperture  16030  and configured to substantially receive the laterally protruding outer flanged portion of the first base component  16148 . The longitudinally protruding center portion of the first base component  16148  may be configured to pass through the apertures  16030  disposed in the center of and extending through the second base component  16150  and the second cap component  16156 . The top of the first base component  16148  may be configured to attach to the bottom of the first cap component  16154 , longitudinally constraining the second base component  16150  and second cap component  16156  between the first base component  16148  and the first cap component  16154 . The first and second cap components  16154 ,  16156  and first base component  16148  may rotate with respect to the second base component  16150 , the bottom of the second base component  16150  configured to attach to the mobile device housing, case, or cover thereof via the attachment interface. 
     One or more cap components  16154 ,  16156  may have a shape resembling a symbol, logo, emblem, or icon, as shown in  FIG.  16 H . Corresponding design features may be disposed in one or more of the first and second cap components  16154 ,  16156 , first and second projections  16024 ,  16026 , and first and second supports  16020 ,  16022 , as shown in  FIGS.  16 H- 16 J . In some implementations, one or more recesses are formed in the bottom of the first cap component  16154  and configured to receive and engage a corresponding portion of one or both of the first and second projections  16024 ,  16026 . 
     In other implementations, one of a first and a second base component  16148 ,  16150  is substantially incorporated into the mobile device housing, case, or cover thereof. In some implementations, the second base component  16150  is substantially incorporated into the mobile device housing, case, or cover thereof, and a recess formed in an interior surface thereof is configured for receiving a portion of a first base component  16148  configured for attachment to one or both of the first and second cap components  16154 ,  16156 . 
       FIG.  17 A  is a top perspective view of an example accessory  17010  with a support  17020  attached to a cap  17018  via a pair of fasteners  17158 .  FIG.  17 B  is a top view of two supports  17020 ,  17022  connected together at their distal ends and attached to a cap  17018  via a pair of fasteners (not shown).  FIG.  17 C  is a top perspective assembly view of  FIG.  17 B . 
     In some implementations, the accessory includes no supports. In other implementations, the accessory  17010  includes just one support (e.g., support  17020 ). As shown in  FIG.  17 A , one or more supports  17020  may be attached to a cap (e.g., cap  17018 ) via a pair of fasteners  17158 . The fasteners  17158  may be disposed in a pair of holes  17160  formed through each end of the support  17020  and in opposite sides of the exterior of the cap  17018 , the holes  17160  configured for receiving and/or engaging the fasteners  17158  and the fasteners  17158  limiting the movement of the support  17020  by at least one degree of freedom with respect to the cap  17018 . In some implementations, the cap  17018  includes a laterally extending projection  17024  disposed on the exterior of the cap  17018  configured to limit the rotation of the support  17020  at a predetermined angle, as shown in  FIG.  17 A . 
     In other implementations, the accessory  17010  includes two or more supports (e.g., supports  17020 ,  17022 ) connected together at their distal ends and rotatably attached to the cap  17018  via a pair of fasteners  17158 , as shown in  FIGS.  17 B- 17 C . A recess disposed in one or more distal ends of one of the supports  17020 ,  17022  may be configured for receiving a corresponding portion protruding from one or more distal ends of another one of the supports  17020 ,  17022 , as shown in  FIGS.  17 B- 17 C . One or more fasteners  17158  selected from the group of fasteners including screws, bolts, rivets, dowels, rods, and pins, and may be configured for permanently or detachably attaching one or more supports  17020 ,  17022  to the cap  17018 , as shown in  FIGS.  17 A- 17 C . 
       FIG.  18 A  is a top perspective assembly view of two projections  18024 ,  18026  each attachable to a cap  18018  via a fastener  18158 .  FIG.  18 B  is a top perspective view of an example accessory  18010  with two projection  18024 ,  18026  each attached to a cap  18018  via a fastener  18158  and two supports  18020 ,  18022  each attached to the cap  18018  via multiple fasteners  18158 .  FIG.  18 C  is a top perspective assembly view of two projections  18024 ,  18026  each attachable to a cap  18018  via a fastener  18158  and a two supports  18020 ,  18022  each attachable to the cap  18018  via multiple fasteners  18158 .  FIG.  18 D  is a bottom perspective view of a cap  18018  with multiple holes  18160  formed in the exterior of the cap  18018  and extending into a fastening block  18162  disposed on the interior of a second annular cap protrusion  18048 .  FIG.  18 E  is a top perspective view of an example accessory  18010  with two projections  18024 ,  18026  and two supports  18020 ,  18022  attached to a cap  18018  via multiple fasteners  18158 .  FIG.  18 F  is a top perspective assembly view two projections  18024 ,  18026  and two supports  18020 ,  18022  attached to a cap  18018  via multiple fasteners  18158 . 
     In some implementations, one or more projections (e.g., projections  18024 ,  18026 ) are permanently or detachably attached to the exterior of a cap  18018  by one or more fasteners  18158 , as shown in  FIGS.  18 A- 18 C  and  FIGS.  18 E- 18 F . In some implementations, one or more supports (e.g., supports  18020 ,  18022 ) are permanently or detachably attached to the exterior of the cap  18018  by two or more fasteners  18158 , as shown in  FIGS.  18 B- 18 C  and  FIGS.  18 E- 18 F . In various implementations, one or more fasteners  18158  selected from the group of fasteners including screws, bolts, rivets, dowels, rods, and pins, are configured for permanently or detachably attaching one or more supports (e.g., supports  18020 ,  18022 ) and/or projections (e.g., projections  18024 ,  18026 ) to the cap  18018 , as shown in  FIGS.  18 A- 18 C and  18 E- 18 F . 
     In some implementations, one or more holes  18160  formed in the exterior perimetric face of the cap  18018  are configured to receive and/or engage a portion of one or more fasteners  18158  and may include threaded engagement features disposed therein. One or more holes  18160  formed in and extending through one or more projections  18024 ,  18026  and/or one or more supports  18020 ,  18022  may be configured to receive and/or engage a portion of the fastener  18158 , as shown in  FIGS.  18 C and  18 F . In some implementations, one or more fastening blocks  18162  are disposed on an interior face of a second annular cap protrusion  18048  and configured for receiving a portion of one or more fasteners  18158 , as shown in  FIG.  18 D . One or more holes  18160  formed in the exterior of the cap  18018  may extend through the second annular cap protrusion  18048  and into a portion of the fastening block  18162 , wherein one or more fasteners  18158  may be received and engaged. In other implementations, the end of one or more fasteners  18158  attaching one or more supports  18020 ,  18022  and/or projections  18024 ,  18026  to the cap  18018  is enlarged and of a size larger than the size of the holes  18160  formed in the supports  18020 ,  18022  and/or projections  18024 ,  18026  and configured to limit the lateral movement of one or more supports  18020 ,  18022  and/or projections  18024 ,  18026  with respect to the cap  18018 , as shown in  FIGS.  18 C and  18 F . 
     In some implementations, one or more projections (e.g., projections  18024 ,  18026 ) are attached to the cap  18018  by a single fastener  18158 , as shown in  FIGS.  18 A- 18 C . As shown in  FIG.  18 C , one or more exterior cap recesses  18058  formed in the exterior perimetric face of the cap  18018  may be configured for receiving and engaging a corresponding portion of one of the projections  18024 ,  18026  protruding from an interior side of the projection, wherein rotational movement of the projection with respect to the cap  18018  may be limited. In other implementations, the projections  18024 ,  18026  and the supports  18020 ,  18022  are attached to the cap  18018  by two or more fasteners  18158 , as shown in  FIGS.  18 E- 18 F . A portion of the fasteners  18158  attaching the supports  18020 ,  18022  to the cap  18018  may be disposed in corresponding holes  18160  formed in the projections  18024 ,  18026 , as shown in  FIGS.  18 E- 18 F . 
     In some implementations, the distal end of one or more fasteners  18158  attached to the cap  18018  is in contact with a portion of a base  18016 , such as a first annular base protrusion, and is configured to enable a user to regulate the amount of rotational friction between the cap  18018  and the base  18016  or to restrict rotational movement of the cap  18018  to or between one or more predetermined positions. In other implementations, one or more fasteners  18158  are configured to regulate the amount of rotational friction between the cap  18018  and one or more attached supports  18020 ,  18022 . In some implementations, one or more fasteners  18158  attached to the cap  18018  extend through one or more annular cap protrusions and are configured to engage with one or more base engagement features, the fasteners  18158  functioning as one or more cap engagement features for rotatably coupling and/or securing the cap  18018  to the base  18016 . In other implementations, a distal end of one or more fasteners  18158  may be enlarged and/or include an annular recess disposed therein and configured for engaging an attachable retaining fastener such as a nut, retaining ring, or spring clip, whereby the end of the fastener may be secured to one or more components of the accessory  18010 . In some implementations one or more fasteners  18158  may pass through a hole extending lengthwise through the center of one or more support arbors (e.g., see  17068  in  FIG.  17 A ) disposed in the ends of one or more supports  18020 ,  18022 . 
       FIG.  19 A  is a top perspective view of a cap  19018  with a rigid support  19164  rotatably attached to the cap  19018 .  FIG.  19 B  is a top perspective view of an example accessory  19010  with three rigid supports  19020 ,  19022 ,  19164  rotatably attached to a cap  19018 .  FIG.  19 C  is a top perspective assembly view of  FIG.  19 B .  FIG.  19 D  is a top perspective view of an example accessory  19010  with three rigid supports  19020 ,  19022 ,  19164  rotatably attached to a cap  19018 .  FIG.  19 E  is a top perspective assembly view of  FIG.  19 D .  FIG.  19 F  is a top perspective view of a rigid support  19164  rotatably attached to a plug  19028 .  FIG.  19 G  is a top perspective view of an example accessory  19010  with two rigid supports  19020 ,  19022  each attached to a cap  19018  via fasteners  19158  and a flexible support  19164  attached to the cap  19018  through two pairs of slots  19166  disposed at opposite ends of the cap  19018 .  FIG.  19 H  is a top perspective assembly view of two rigid supports  19020 ,  19022  each attached to a cap  19018  via fasteners  19158  and a flexible support  19164  attached to the cap  19018  through two pairs of slots  19166  disposed at opposite ends of the cap  19018 .  FIG.  19 I  is a top perspective assembly view of two rigid supports  19020 ,  19022  each attached to a cap  19018  via a pair of support arbors  19068  and a third flexible support  19164  configured with an adjustable tensioner  19172  and attached to the cap  19018  via a pair of fasteners  19158 .  FIG.  19 J  is a top perspective view of a flexible support  19020  configured with a mechanism for self-attachment and attached to a cap  19018  through a pair of slots  19166  formed in opposite ends of the cap  19018 .  FIG.  19 K  is a top perspective view of a flexible support  19022  attached to a cap  19018  through a pair of slots  19166  formed in opposite ends of the cap  19018  and secured via fasteners  19158  at each end, the cap  19018  rotatably coupled to a base  19016 .  FIG.  19 L  is a bottom perspective view of a cap  19018  with two fasteners  19158  disposed at opposite ends in the interior of the cap  19018  and configured for attaching a flexible support.  FIG.  19 M  is a bottom perspective assembly view of a flexible support  19020  with fasteners  19158  disposed in each end and configured for attachment to a pair of slots  19166  disposed opposite in the interior perimeter of a cap  19018 .  FIG.  19 N  is a top perspective view of a plug  19028  with a flexible support  19164  disposed in a pair of recesses  19166  formed in opposite sides of the plug  19028 .  FIG.  19 O  is a top perspective sectional view of  FIG.  19 N  showing the flexible support  19164  configured with enlarged distal ends.  FIG.  19 P  is a top perspective sectional view of a plug  19028  with a concave top portion and a flexible support  19164  disposed in a pair of recesses  19166  formed in opposites sides of the plug  19028 .  FIG.  19 Q  is a top perspective view of a plug  19028  with a flexible support  19164  laterally disposed in a pair of recesses  19166  formed in opposites sides of the plug  19028 .  FIG.  19 R  is a top perspective view of a plug  19028  with a flexible support  19164  laterally disposed in a pair of recesses  19166  formed in opposites sides of the plug  19028  and a rigid prop  19168  attached to the support  19164  and configured for engagement with a pair of prop engagement features  19170 .  FIG.  19 S  is a top perspective view of a plug  19028  with a flexible support  19164  laterally disposed in a pair of recesses  19166  formed in opposites sides of the plug  19028  and a rigid prop  19168  configured for engagement with a prop engagement feature  19170  and rotatably attached to the support  19164  via a fastener  19158 . 
     In various implementations, the accessory  19010  includes more than two supports. In some implementations, a third support (e.g., support  19164 ) is attached to the accessory  19010 . In some implementations, the third support  19164  is substantially rigid, as in  FIGS.  19 A- 19 F . In other implementations, the third support  19164  is substantially flexible, as shown in  FIGS.  19 G- 19 I . In some implementations, the third support  19164  is disposed in the center of a cap  19018  and is rotatable with respect to the cap, as shown in  FIG.  19 A . In other implementations, the third support  19164  may be disposed in one or more slots  19166  formed in one or more of the cap  19018 , a base  19016 , one or more projections  19024 ,  19026 , and a plug  19028 , the slots  19166  having a profile corresponding to and configured for receiving a portion of the support  19164 , as shown in  FIGS.  19 H- 19 I . 
     In some implementations, the third support  19164  is substantially arc-shaped, annular, or rectangular, as shown in  FIGS.  19 A- 19 F . An exterior portion of the third support  19164  may be flat, beveled, or chamfered, as shown in  FIG.  19 D . In some implementations, the ends of the third support  19164  are attached to the accessory  19010  by one or more fasteners  19158 . In other implementations, one or more support arbors  19068  extending from one or more distal ends of the third support  19164  are disposed in one or more corresponding exterior cap recesses and/or slots  19166  formed in one of the cap  19018  and the plug  19028  and configured for limiting movement of the third support  19164  in one or both of a lateral and longitudinal direction, as shown in  FIGS.  19 A- 19 C and  19 F . In other implementations, one or more features for retaining a portion of the third support  19164  are included in one or more projections  19024 ,  19026 , (e.g., see slot  19166  in  FIG.  19 E ) whereby the third support  19164  may be rotatably connected to the cap  19018  and movement of the support  19164  in one or both of a lateral and longitudinal direction may be restricted, as shown in  FIGS.  19 D- 19 E . 
     As shown in  FIGS.  19 G- 19 S , one or more of a first, second, and third support (e.g., supports  19020 ,  19022 ,  19164 ) attachable to the accessory  19010  may be substantially flexible, in the general form of a band, loop, strap, ribbon, or cord. One or more slots  19166  formed in one or more components of the accessory  19010 , such as the base  19016 , the cap  19018 , the plug  19028 , and the projections  19024 ,  19026 , may be configured for receiving one or more flexible supports (e.g., support  19164 ) and may extend through a portion of one or both of the interior and exterior perimeters of the component, facilitating attachment of one or more flexible supports thereto and detachment therefrom, as shown in  FIGS.  19 G- 19 I and  19 N- 19 S . In some implementations, a portion of the flexible support (e.g., support  19164 ) may be configured to pass through a slot formed in one or more projections  19024 ,  19026  and may be secured to the cap  19018  via one or more fasteners  19158 , as shown in  FIG.  19 I . In other implementations, one end of the flexible support  19164  may be configured to pass through a slot formed in one projection  19026  and the other end of the flexible support  19164  configured to loop around the sides and underneath the other projection  19024 , enabling a user to easily attach or detach the support from the accessory  19010  as needed. 
     One or more adjustment mechanisms  19172  configured for adjusting the length, tautness, or tension of the flexible support (e.g., support  19164 ), such as a spring-loaded adjustable tensioner, may be attached to one end of the flexible support  19164 , as shown in  FIG.  19 I . In other implementations, one or more flexible supports (e.g., support  19164 ) may include a mechanism for fastening one portion of the support to another portion, such as hook-and-loop fasteners, interlocking connectors, slide buckles, ladder lock buckles, or reusable adhesive, whereby the length, tautness, or tension of the support  19020  may be adjusted, as shown in  FIG.  19 J . In other implementations, one or more flexible supports are permanently attached to one or more components of the accessory  19010  and may be joined together by thermoforming, heat staking, welding, or adhesive. 
     In some implementations, one or more holes or loops formed in one or more ends of one or more flexible supports (e.g., supports  19020 ,  19022 ,  19164 ) are configured for receiving one or more fasteners  19158 , whereby the ends of the supports  19022  may be secured to the accessory  19010 , as shown in  FIGS.  19 I and  19 K . The fasteners  19158  securing one or more ends of one or more flexible supports to the accessory  19010  may be of a size and shape larger than the slots  19166  formed in one of the base  19016 , the cap  19018 , the plug  19028 , and the projections  19024 ,  19026  in which one or more flexible supports may be disposed, and may restrict the ends of the supports from passing through the slots  19166  and detaching from the accessory  19010 . In other implementations, the ends of one or more flexible supports may be configured to attach to one or more fasteners  19158  disposed in one or more of the base  19016 , the cap  19018 , the plug  19028 , and the projections  19024 ,  19026 , as shown in  FIG.  19 L . In other implementations, one or more fasteners  19158 , such as a buckle, hook, or clasp, are attached to one or more ends of one or more flexible supports (e.g., support  19020 ) and configured for engaging with one or more corresponding engagement features, fasteners  19158 , or slots  19166  disposed in one or more of the cap  19018 , the base  19016 , the plug  19028 , and the projections  19024 ,  19026 , as shown in  FIG.  19 M . 
     In other implementations, a rigid feature is disposed in one or more ends of one or more flexible supports (e.g., supports  19020 ,  19022 ,  19164 ) and configured to be received and engaged in one or more slots  19166  formed in one or more of the base  19016 , the cap  19018 , the plug  19028 , and the projections  19024 ,  19026 , the rigid feature preventing the end of the flexible support from passing through one or more slots  19166  in which it is disposed. 
     In some implementations, the flexible support (e.g., support  19164 ) is attached to the plug  19028  through a pair of slots  19166  formed in opposite sides of the plug  19028 . A portion of one or more of the slots  19166  formed in the plug  19028  may extend through the exterior perimeter of the plug  19028  facilitating attachment and detachment of the support  19164  from the plug  19028 , as shown in  FIG.  19 N . In some implementations, one or more distal ends of the flexible support  19164  are rigid or enlarged and configured to engage with a portion of one or more corresponding slots  19166  formed in the plug  19028  wherein the ends of the support  19164  are constrained from moving in one or both of a lateral and longitudinal direction, as shown in  FIGS.  19 N- 19 O and  19 Q- 19 S . An aperture  19030  may be formed in the center of one or both of the cap  19018  and the plug  19028  or a top portion of one or both of the cap  19018  and the plug  19028  may be recessed or concave, in order to facilitate user engagement with and deployment of the flexible support attached therein, as shown in  FIGS.  19 F- 19 S . 
     In other implementations, a substantially flat and rigid prop  19168  is attached to a proximal portion of the flexible support (e.g., support  19164 ) and configured to engage with one or more prop engagement features  19170  disposed in the plug  19028  wherein one or more ends of the prop  19168  may be rotatably inserted, secured, and oriented such that the opposite end of the prop extends away from the plug  19028  at a predetermined angle and whereby the prop  19168  may be used to support a mobile device in one or more display orientations on a support surface, as shown in  FIGS.  19 R- 19 S . A notch may be formed in a portion of one end of the prop  19168 , enabling the prop to be inserted into one or more prop engagement features  19170 , as shown in  FIG.  19 R . In some implementations, the prop  19168  is pliable or flexible and may be shaped to conform to an inner or outer profile of the plug  19028  or one or more prop engagement features  19170 . In other implementations, the center of the prop  19168  may be attached the center of the flexible support  19164  by one or more fasteners  19158 , the fasteners defining an axis of rotation about which the prop  19168  may freely rotate with respect to the flexible support  19164 , as shown in  FIG.  19 S . In some implementations, the plug  19028  includes multiple prop engagement features  19170  configured for engaging one or more sides or ends of the prop  19168  and orienting the prop at different predetermined angles with respect to the plug  19028 . In various implementations, one or more supports (e.g., supports  19020 ,  19022 ,  19164 ) include both rigid and flexible parts. Indicia may be disposed on one or more surfaces of one or more of the supports  19020 ,  19022 ,  19164 , and the prop  19168 , as shown in  FIG.  19 N . 
       FIG.  20 A  is a bottom perspective assembly view of an example accessory  20010  with multiple magnetic attachment elements  20084  arranged annularly around the inside of a cap  20018  and configured to attach to a magnetic attachment interface  20042  disposed in the bottom of a base  20016 .  FIG.  20 B  is a bottom perspective assembly view of multiple magnetic attachment elements  20084 ,  20086 ,  20088  combinable together in a continuous shape and disposed inside a cap  20018 .  FIG.  20 C  is a bottom perspective assembly view of a cap  20018  configured for receiving and engaging an annular attachment element  20084  disposed therein.  FIG.  20 D  is a top perspective sectional view of an example accessory  20010  with multiple magnetic attachment elements  20084 ,  20086 ,  20088  disposed in a cap  20018  and configured to attach to a magnetic attachment interface  20042  disposed in the bottom of a base  20016 , the cap further including multiple annular cap protrusions  20044 ,  20054  disposed adjacent to an annular base protrusion  20036 .  FIG.  20 E  is an enlarged sectional view of an example accessory  20010  with a ball bearing attachment element  20084  disposed in between a cap  20018  and a base  20016 .  FIG.  20 F  is a top perspective assembly view of an example accessory  20010  with a magnetic bearing attachment element  20084  attached to one or more magnetic attachment elements (not shown) disposed in a cap  20018  configured to rotatably couple to a magnetic attachment interface  20042  disposed on an exterior surface of a mobile device  20012 .  FIG.  20 G  is a top perspective assembly view of an example accessory  20010  including a cap  20018  with a magnetic attachment element  20084  disposed therein and configured to magnetically couple to a magnetic attachment interface  20042  disposed in a recess formed in an exterior surface of a mobile device case  20073 , and a plug  20028  with a magnetic attachment element  20088  disposed on a bottom surface thereof and configured for attachment to another magnetic attachment element  20090  disposed in a recess (not shown) formed in the bottom interior surface of the mobile device case  20073 .  FIG.  20 H  is a top perspective assembly view of an example accessory  20010  with a cap  20018  rotatably coupled to a base  20016  attached to a magnetic attachment interface  20042  configured for attachment to a mobile device  20012  with multiple magnetic attachment elements  20090  disposed therein. 
     In various implementations, one or more attachment elements (e.g., elements  20084 ,  20086 ,  20088 ) are attached to or disposed in or on a surface of one or more components of the accessory  20010  such as a base  20016 , a cap  20018 , a plug  20028 , an attachment interface  20042 , and an intermediate mounting pad, and are configured for coupling one or more components of the accessory  20010  together. In some implementations, one or more attachment elements (e.g., elements  20084 ,  20086 ,  20088 ), are magnetic and configured for rotatably coupling the base  20016  and the cap  20018  together, as shown in  FIGS.  20 A and  20 D . In other implementations, one or more magnetic attachment elements (e.g., elements  20084 ,  20086 ,  20088 ,  20090 ) are configured for rotatably coupling the cap  20018  to one or more of the attachment interface  20042  and the mobile device  20012  housing, case  20073 , or cover thereof, as shown in  FIGS.  20 A- 20 D . In other implementations, one or more attachment elements (e.g., element  20090 ) are attached to or disposed in or on a surface of one or more of the mobile device  20012  housing, case  20073 , or cover thereof and may be configured to mechanically, magnetically, or adhesively engage with one or more of the supports  20020 ,  20022  and/or other attachment elements attached to or disposed in or on a surface of one or more of the supports  20020 ,  20022 , and may be configured to retain one or more of the supports  20020 ,  20022  in a retracted position. 
     One or more attachment elements may be substantially annular, circular, semi-circular, arc-shaped, disc-shaped, wedge-shaped, crescent-shaped, square, rectangular, or cylindrical, and disposed in one or more corresponding recesses formed in one or more of the base  20016 , the cap  20018 , the attachment interface  20042 , and the mobile device  20012  housing, case  20073 , or cover thereof. As shown in  FIG.  20 A , multiple magnetic attachment elements (e.g., element  20084 ) may be disposed in correspondingly shaped cap recesses  20056  arranged annularly around the inside of the cap  20018  and configured to attach to the magnetic attachment interface  20042  disposed in a corresponding recess  20040  formed in the bottom of the base  20016  circumscribing the first annular base protrusion  20036 . The first annular base protrusion  20036  may be disposed adjacent to the first annular cap protrusion  20044  and configured for limiting lateral movement of the cap  20018  and keeping the cap  20018  concentrically aligned with the base  20016  about a common axis of rotation. In some implementations, one or more magnetic attachment elements (e.g., element  20084 ) are disposed in the cap  20018  between a first and second annular cap protrusion  20044 ,  20048 , as shown in  FIGS.  20 A- 20 C . In other implementations, one or more magnetic attachment elements (e.g., element  20084 ) are disposed in the cap  20018  between the first and third  20044 ,  20054  or second and third annular cap protrusions  20048 ,  20054 , as shown in  FIG.  20 D . 
     One or more magnetic attachment elements (e.g., elements  20084 ,  20086 ,  20088 ,  20090 ) may have a shape and/or profile corresponding to an exterior or interior perimeter or surface of one or more of the base  20016 , the cap  20018 , the attachment interface  20042 , and the mobile device  20012  housing, case  20073 , or cover thereof. In some implementations, one or more magnetic attachment elements (e.g., elements  20084 ,  20086 ,  20088 ) may be combined together to form a continuous shape, as shown in  FIG.  20 B . In other implementations, one or more annular cap protrusions (e.g., protrusions  20044 ,  20054 ) disposed adjacent to a first annular base protrusion  20036  provide a mechanism for concentrically centering the magnetically coupled base  20016  and cap  20018  around a common axis of rotation  20034 , as shown in  FIGS.  20 A- 20 C . 
     In some implementations, the attachment interface  20042  is magnetic or includes one or more magnetic attachment elements (e.g., element  20086 ) attached to or disposed in or on a surface thereof, as shown in  FIGS.  20 A,  20 D, and  20 F- 20 H . The attachment interface  20042  may be attached to or disposed in or on a surface of the mobile device  20012  housing, case  20073 , or cover thereof, and may be configured for attachment to one or more other attachment elements (e.g., elements  20084 ,  20086 ,  20088 ) disposed in one or more of the cap  20018 , the base  20016 , and the plug  20028 , as shown in  FIGS.  20 A,  20 D, and  20 F- 20 H . In some implementations one or both of the cap  20018  and the plug  20028  are configured to attach directly to the attachment interface  20042  and/or one or more attachment elements (e.g., element  20090 ) disposed in the mobile device  20012  housing, case  20073 , or cover thereof without a base  20016  disposed in between, as shown in  FIGS.  20 F- 20 G . In some implementations, the cap  20018  includes one or more magnetic attachment elements (e.g., elements  20084 ,  20086 ) disposed therein and configured to rotatably couple to a magnetic attachment interface  20042  adhesively attached to an exterior surface of the mobile device  20012  housing, case  20073 , or cover thereof, or in a recess formed in a surface thereof, as shown in  FIGS.  20 F- 20 G . In some implementations, the attachment interface  20042  is wholly or partially received in a recess formed in the bottom of the cap  20018 . One or more annular cap protrusions  20044 ,  20048  disposed adjacent to an inner or outer perimeter of the attachment interface  20042  may keep the cap  20018  concentrically aligned with the attachment interface  20042  about the common axis of rotation  20034  and limit the cap  20018  from moving laterally with respect to the attachment interface  20044 . In some implementations, one or both of the cap  20018  and the plug  20028  substantially surround and conceal the attachment interface  20042 . 
     One or more magnetic attachment elements (e.g., elements  20084 ,  20086 ,  20088 ) attached to or disposed in the cap  20018  may be secured to the cap  20018  via friction fit, press fit, adhesive, or epoxy and may be encased in a protective plastic, silicone, or rubber encasement to protect the attachment elements from damage. In some implementations, one or more cap engagement features (e.g., feature  20046 ) disposed on one or more annular cap protrusions (e.g., protrusion  20044 ) are configured for engaging and retaining the attachment element in the cap  20018 . In other implementations, the base  20016  may be adhesively attached to the top of the magnetic attachment interface  20042 , the attachment interface  20042  configured to attach to one or more magnetic attachment elements (e.g., element  20090 ) disposed in the mobile device  20012  housing, case  20073 , or cover thereof, as shown in  FIG.  20 H . 
     In some implementations, one or more magnetic attachment elements (e.g., element  20090 ), are attached to or disposed in or on a surface of one or more of the mobile device  20012  housing, case  20073 , and cover thereof, and configured for attachment to one or more other magnetic attachment elements (e.g., elements  20084 ,  20086 ,  20088 ) disposed in one or more of the attachment interface  20042 , the base  20016 , the cap  20018 , the plug  20028 , and supports  20020 ,  20022 , as shown in  FIG.  20 F- 20 H . One or more recesses may be formed in one or both of an interior and exterior surface of the mobile device  20012  housing, case  20073 , or cover thereof, and configured for receiving the attachment interface  20042  and/or one or more attachment elements (e.g., element  20090 ), as shown in  FIG.  20 G . In some implementations, one or more magnetic attachment elements (e.g., element  20090 ) are disposed in a recess (not shown) formed in the interior of a mobile device case  20073  and configured for magnetically attaching to one or more other magnetic attachments element (e.g., element  20088 ) attached to or disposed in or on a surface of one or more of the base  20016 , the cap  20018 , and the plug  20028 , as shown in  FIG.  20 G . In some implementations, a substantially rigid or substantially flexible support (e.g., support  20164 ) may be attached to or disposed in or on a surface of the attachment interface  20042  and/or attachment element (e.g., element  20088 ), the support  20164  providing an user engagement for detaching one or both of the attachment interface  20042  and the attachment element (e.g., element  20088 ) from one or more other attachment elements (e.g., element  20090 ) or from the mobile device  20012  housing, case  20073 , or cover thereof, as shown in  FIG.  20 H . 
     One or more recesses or protrusions extending longitudinally from one or more surfaces of the attachment interface  20042 , the mobile device  20012  housing, case  20073 , or cover thereof, may be configured to engage with one or more annular protrusions disposed in one of the base  20016 , the cap  20018 , and the plug  20028  to concentrically align the components and limit their movement in a lateral direction as shown in  FIGS.  20 F- 20 H . In some implementations, the attachment interface  20042  includes one or more recesses formed in the bottom surface thereof and configured for receiving one or more magnetic attachment elements (e.g., element  20086 ), the magnetic attachment elements configured to magnetically attach to and correlate with one or more other magnetic attachment elements (e.g., element  20090 ) disposed in the mobile device  20012  housing, case  20073 , or cover thereof, as shown in  FIG.  20 H . In other implementations, one or more attachment elements (e.g., element  20084 ) with a shape or profile generally conforming to an aperture  20030  formed in one of the base  20016  and the cap  20018  may be attached to or disposed in or on a surface of the attachment interface  20042 , and may protrude longitudinally from the top surface of the attachment interface  20042 , the inner and/or outer perimetric faces of the attachment element  20086  providing an engagement for limiting the lateral movement of one or more annular protrusions disposed in one or both of the base  20016  and the cap  20018 , as shown in  FIG.  40 H . In other implementations, the aperture  20030  formed in one of the base  20016  and the cap  20018  is enclosed on a bottom side and a magnetic attachment element may be disposed in the aperture  20030  on a top surface thereof, the attachment element configured to magnetically attach one of the base  20016  and the cap  20018  with one or more magnetic attachment elements (e.g, element  20090 ) attached to or disposed in or on a surface of the mobile device  20012  housing, case  20073 , or cover thereof. 
     In some implementations, a bearing  20175 , such as a ball bearing, roller bearing, ultra-thin bearing, race bearing, or turntable type bearing, is attached to or disposed in or around one or both of the cap  20018  and the base  20016 , or between the cap  20018  and the attachment interface  20042 , the bearing configured for facilitating smooth and continuous rotation between one or more components of the accessory  20010 , as shown in  FIGS.  20 E- 20 F . In some implementations, the bearing  20175  is magnetic and configured for attachment to the magnetic attachment interface  20042  or one or more magnetic attachment elements disposed in one or both of the cap  20018  and the base  20016 . In other implementations, a low-friction element  20174  composed of a material like PTFE, nylon, or Teflon is disposed between two or more components of the accessory  20010 , such as the cap  20018  and the attachment interface  20042 , or between one or more magnetic attachment elements (e.g., element  20084 ) and the attachment interface  20042 , the low-friction element  20174  configured for reducing rotational friction between two or more components of the accessory  20010 , as shown in  FIG.  20 G . In other implementations, a portion of one or more components of the accessory  20010  may be covered with a low-friction coating. 
       FIG.  21 A  is a top perspective assembly view of an example accessory  21010  with a base  21016  substantially integrated into a mobile device case  21073  with a recess (not shown) formed in an interior surface of the case  21073  configured to receive one or more of an attachment interface, a protective cover  21070 , and an attachment element  21084 .  FIG.  21 B  is a top perspective view of a base  21016  substantially integrated into a mobile device cover  21176  with a first annular base protrusion extending longitudinally from an exterior surface of the cover  21176 .  FIG.  21 C  is a top perspective assembly view of an example accessory  21010  with a base  21016  having a shape and profile generally conforming with and configured for attachment to an exterior surface of a mobile device  21012 .  FIG.  21 D  is a top perspective view of an example accessory  21010  with a base  21016  configured for attachment to two sides of a mobile device  21012 .  FIG.  21 E  is a top perspective view of an example accessory  21010  with a base  21016  disposed on a surface of and attached around two opposite sides of a mobile device  21012 .  FIG.  21 F  is a top perspective view of an example accessory  21010  disposed on top of an example second mobile accessory  21178  configured for attachment to a surface of a mobile device  21012  housing, case  21073 , or cover  21176  thereof.  FIG.  21 G  is a top perspective sectional view of an example second mobile accessory  21178  with a recess formed in the top configured for receiving a portion of a base  21016 .  FIG.  21 H  is a top perspective sectional view of an example second mobile accessory  21178  with a bottom portion configured to attach to a corresponding base engagement feature disposed in one of a base  21016  and a mobile device  21012  housing, case  21073 , and cover  21176  thereof. 
     As shown in  FIGS.  21 A- 21 E , in various implementations, a base  21016  has a profile generally matching a portion of the profile of a mobile device  21012  and is configured to attach to one or more exterior surfaces of the mobile device  21012 . In other implementations, the base  21016  is substantially incorporated into one of the mobile device  21012  housing, case  21073 , and cover  21176  thereof, as shown in  FIGS.  21 A- 21 B . In some implementations, one or more base engagement features  21038  extends radially inward or outward from an interior or exterior perimetric face of one or more annular base protrusions  21036  disposed in and extending longitudinally from a surface of one of the base  21016  and/or a mobile device  21012  housing, case  21073 , and cover  21176  thereof, as shown in  FIGS.  21 A- 21 B . 
     An aperture  21030  circumscribed by the first annular base protrusion  21036  may be formed in the center of the base  21016  and may be enclosed on one side (e.g., see  FIG.  21 B ) or extend therethrough (e.g., see  FIG.  21 A ). A recess (not shown) formed in the bottom of the base  21016  and/or in an interior surface of one of the mobile device case  21073  and the mobile device cover  21176  may be configured for receiving and/or engaging one or more of a permanently or detachably attachable attachment interface (not shown), one or more attachment elements (e.g., element  21084 ), and a protective cover  21070 . In some implementations, the protective cover  21070  is permanently attached to the interior surface of one of the base  21016 , the mobile device case  21073 , and the mobile device cover  21176  via thermoforming, welding, or adhesive and is configured to protect a surface of the mobile device  21012 . In other implementations one of the protective cover  21070  and one or more attachment elements (e.g., element  21084 ) may be attached to the interior surface of one of the mobile device case  21073  and cover  21176  via the attachment interface. In some implementations, one or more attachment elements (e.g., element  21084 ) disposed in the bottom of the base  21016  and/or an interior surface of one of the mobile device case  21073  and cover  21176  are magnetic or otherwise configured to provide a mechanism for attaching to one or more other attachment elements (e.g., element  21090 ) disposed in one or more of a cap  21018 , a plug  21028 , or a mount (not shown), as shown in  FIG.  21 A . 
     As shown in  FIG.  21 B , one or more magnetic attachment elements (e.g., element  21084 ) may be attached to or embedded in one or more portions of a mobile device cover  21176  and configured for attachment to one or more other magnetic attachment elements disposed in one of the cap  21018  and the plug  21028 . In some implementations, the mobile device cover  21176  includes two substantially flat portions connected by a flexible hinged portion, as shown in  FIG.  21 B . One substantially flat portion of the mobile device cover  21176  containing one or more magnetic attachment elements (e.g., element  21084 ) may be folded back and placed adjacent to or in close proximity to one or more other magnetic attachment elements disposed in one of the cap  21018  and the plug  21028 , whereby a magnetic force is exerted between the magnetic elements sufficient to magnetically secure the folded cover portion to the accessory  21010 . In other implementations, a protrusion may be disposed on an exterior surface of a substantially flat portion of the mobile device cover  21176 , with the exterior perimeter of the protrusion configured to fit inside the aperture  21030  formed in the center of the accessory  21010 , the interior perimeter of the cap  21010  configured to retain the annular protrusion disposed in the cover  21176  by friction, interference fit, or snap fit. In other implementations, the protrusion extending from the exterior surface of the cover  21176  includes one or more attachment features or attachment elements (e.g., element  21084 ) disposed in an outer surface thereof and may be configured to engage with one or more attachment features or attachment elements disposed in one of the base  21016  and the cap  21018 , or on an opposite side of the cover  21176 . 
     In some implementations, the base  21016  has a shape generally conforming to one of the two largest surfaces of the mobile device  21012  and is configured to substantially cover and protect the surface of the mobile device  21012  from damage, as shown in  FIG.  21 C . In some implementations, an attachment interface (not shown), such as an adhesive film, nano-suction pad, or sticky gel pad, having a profile generally matching the profile of the base  21016 , is disposed on a bottom surface of the base  21016  or disposed in a recess formed therein and configured for attachment to the mobile device  21012  housing, case  21073 , or cover  21176  thereof. In some implementations, the base  21016  is substantially flat and configured for attachment to a substantially flat surface of the mobile device  21012  housing, case  21073 , or cover  21176  thereof, as shown in  FIG.  21 C . In other implementations, one or more portions of the base  21016  is configured to detachably attach to one or more edges or sides of the mobile device  21012 . One or more portions of the base  21016  may attach to the mobile device  21012  by snap fit or friction fit. In some implementations, the base  21016  is attached to two opposing sides of the mobile device  21012 , allowing the accessory  21010  to be secured to the mobile device  21012  at one or more predetermined positions, as shown in  FIGS.  21 D- 21 E . 
     In other implementations, the base  21016  is disposed in or configured for attachment to the top of a second mobile accessory  21178  such as a card case configured for storing one or more of a user&#39;s cards. The bottom of the second mobile accessory  21178  may be configured for attachment to one of the base  21016  and the mobile device  21012  housing, case  21073 , and cover  21176  thereof, and the top of the second mobile accessory  21178  may be configured for attachment to one of the attachment interface, the base  21016 , the cap  21018 . Other examples of second mobile accessories  21178  include, but are not limited to, wallets, charging devices, batteries, scanners, cameras, spatial location beacons, and financial payment processors. 
     In some implementations, a protrusion with a shape and profile generally conforming to the shape of the aperture  21030  formed in the center of the accessory  21010  extends longitudinally from the bottom of the second accessory  21178  and is configured to attach to one of the base  21016  and the cap  21018 , as shown in  FIG.  21 G . In other implementations, a recess is disposed in the top surface of the second accessory  21178  and configured for substantially receiving a bottom portion of the base  21016 , as shown in  FIG.  21 G . In other implementations, one or more recesses or apertures may be disposed in the top of the second mobile accessory  21178  and configured for receiving and engaging a portion of one or both of a first and second base components, (e.g., see first and second base components  16148 ,  16150  in FIG.  16 J). In other implementations, one or more base engagement features (e.g., see feature  21038  in  FIG.  21 B ) extends radially inward or outward from an interior or exterior perimetric face of one or more annular base protrusions  21036  (e.g., see protrusion  21036  in  FIG.  21 B ) disposed in and extending longitudinally from the top of the second mobile accessory  21178  and are configured to attach to the cap  21018 . In other implementations, an attachment element may be attached to or disposed in or on a surface of the second mobile accessory  21178  and configured for attachment to one or more of the attachment interface, the base  21016 , the cap  21018 , the plug  21028 , and another attachment element. In other implementations, one or more portions of the cap  21018 , such as an annular cap protrusion  21044  and cap engagement feature  21046 , are disposed in the bottom of the second mobile accessory  21178  and configured for attaching to a portion of the base  21016 , such as the base engagement feature (e.g., see  21038  in  FIG.  21 B ), as shown in  FIG.  21 H . In some implementations, one or both of the top and bottom exterior surfaces of the second mobile accessory  21178  are substantially flat. In other implementations, a recess is formed in the bottom of the second mobile accessory  21178  configured for substantially receiving one or more portions of the base  21016 , as shown in  FIG.  21 H . Other recesses may be formed in the top, bottom, or sides of the second mobile accessory  21178  and configured for receiving and/or retaining one or more tools or common items of everyday personal conveyance such as a key or a pocket-knife, as shown in  FIG.  21 H . 
       FIG.  22 A  is a top perspective view of a base  22016  with an opening  22180  formed in the bottom surface and extending through an interior and exterior perimetric face thereof.  FIG.  22 B  is a bottom perspective view of an attachment interface  22042  with two openings  22180  extending through an interior and exterior perimetric face thereof and attached to the bottom of a base.  FIG.  22 C  is a top perspective view of an intermediate mounting pad  22072  with an opening  22180  formed in and extending through an interior and exterior perimetric face thereof.  FIG.  22 D  is a top perspective view of a plug  22028  with a flexible support  22164  attached at one end.  FIG.  22 E  is a top perspective view of a plug  22028  disposed in a cap  22018  and configured with a flexible support  22164  extending outward through an opening  22180  (not shown) formed in the bottom of a base  22016 .  FIG.  22 F  is a top perspective assembly view of an electronic port  22184  connected to an electronic connector  22188  via a flexible cable  22186  and configured for connection with a second electronic port  22190  disposed in a plug  22028 .  FIG.  22 G  is a top perspective assembly view of an example accessory  22010  with an electronic port  22184  disposed in a base  22016  and configured for connection with a second electronic port  22190  (not shown) disposed in a plug  22028  with visual indicators  22192  disposed in a top surface thereof.  FIG.  22 H  is a top perspective view of an example accessory  22010  with an electronic connector  22188  disposed in the electronic port of a mobile device  22012 , with a flexible cable  22186  connecting the electronic connector  22188  and a first electronic port  22184  (not shown) configured for attachment to a second electronic port  22190  (not shown) disposed in a plug  22028 . 
     In some implementations, one or more openings  22180  formed in one or more of an intermediate mounting pad  22072 , an attachment interface  22042 , and a base  22016  and extending through a portion of the interior and exterior perimeters thereof are configured for receiving a portion of a substantially thin, flat, or flexible component, such as a portion of a plug removal feature (not shown, e.g., see  6074  in  FIG.  6 B ) or a support (e.g.,  22164  in  FIG.  22 D ). In some implementations, one or more base openings  22180  are formed in the bottom of the base  22016  and extend through a portion of the interior and exterior perimeters thereof, as shown in  FIG.  22 A . In other implementations, one or more openings  22180  are disposed in the attachment interface  22042  and extend through a portion of the interior and exterior perimeters thereof, as shown in  FIG.  22 B . In other implementations one or more openings  22180  are disposed in the intermediate mounting pad  22072  and extend through a portion of the interior and exterior perimeters thereof, as shown in  FIG.  22 C . One or more openings formed in one or more of the intermediate mounting pad  22072 , the attachment interface  22042 , and the base  22016  may extend into an aperture  22030  formed in the center of one of the intermediate mounting pad  22072 , the attachment interface  22042 , and the base  22016 . 
     As shown in  FIGS.  22 D- 22 E , one or more flexible supports (e.g., support  22164 ) may be configured to pass through one or more openings  22180  formed in one of the intermediate mounting pad  22072 , the attachment interface  22042 , and the base  22016 . In some implementations, one or more flexible supports  22164  attached to one of the cap  22018  and a plug  22028  are configured to extend through one or more openings  22180  formed in one of the intermediate mounting pad  22072 , the attachment interface  22042 , and the base  22016 , and may be configured for engaging one or more of a user&#39;s fingers. 
     As shown in  FIGS.  22 F- 22 H , in other implementations, an electronic port (e.g., port  22184 ) with a flexible cable  22186  extending therefrom is configured to pass through one or more openings  22180  formed in one or both of the intermediate mounting pad  22072 , the attachment interface  22042 , and the base  22016 . An electronic connector (e.g., connector  22188 ) configured for connecting to an electronic port (not shown) disposed in a mobile device  22012  may be disposed on one distal end of the cable  22186  opposite the electronic port  22184 . The electronic port  22184 , cable  22186 , and electronic connector  22188  may be configured to transmit one or both of power and data between the mobile device  22012  and a second electronic port  22190  disposed in the plug  22028 . In some implementations, a flexible support is disposed on top of the cable  22186  and configured for receiving one or more of a user&#39;s fingers. In other implementations, the cable  22186  may function as a flexible support and be configured for receiving one or more of a user&#39;s fingers. In other implementations, an adhesive film, nano-suction pad, or sticky gel pad may be disposed on a bottom surface of one or both of the electronic port  22184  and cable  22186  and configured to adhere to a surface of the mobile device  22012  housing, case, or cover thereof, or an intermediate mounting pad  22072 . In other implementations, one or more of the electronic port  22184 , cable  22186 , and electronic connector  22188  are substantially integrated into or embedded in the mobile device  22012  housing, case, or cover thereof. In some implementations, one or more plugs  22028  configured with an electronic port  22190  include one or more LED indicators  22192  disposed in the top of the plug  22028  and configured to display information to a user related to one or both of power and data, as shown in  FIGS.  22 G- 22 H . 
     In some implementations, one or more magnetic elements are disposed in or around the electronic port  22184  and are configured for aligning with and attaching to one or more magnetic elements disposed in or around the second electronic port  22190  disposed in the plug  22028 . In some implementations, the plug  22028  includes a battery capable of charging one or more other batteries disposed in the mobile device  22012  through the second electronic port  22190 , first electronic port  22184 , cable  22186 , and connector  22188 . In other implementations, the plug  22028  includes one or both of a solid-state data drive and data processor, capable of transmitting, storing, and/or processing data to and/or from the mobile device  22012 . 
       FIG.  23 A  is a top perspective view of a flexible support  23194  disposed in an intermediate mounting pad  23072 .  FIG.  23 B  is a top perspective view of a flexible support  23194  disposed in a base projection  23198 .  FIG.  23 C  is a top perspective view of a flexible support  23194  and a rotatable rigid support  23196  disposed in a base projection  23198 .  FIG.  23 D  is a top perspective view of a rotatable rigid support  23196  attached to a base projection  23198  by a hinge  23200 .  FIG.  23 E  is a top perspective view of a rotatable rigid support  23196  attached to a base projection  23198  by a hinge  23200 .  FIG.  23 F  is a top perspective view of a rotatable rigid support  23196  disposed in the bottom of a base  23016  and with a stop  23204  extending from one end of the support  23196  through an opening disposed in the bottom of the base  23016 , the stop  23204  configured to be received in a corresponding recess formed in the bottom of a plug  23028 .  FIG.  23 G  is a top perspective view of an example accessory  23010  and support retainer  23202  attached to a surface of a mobile device  23012 , the accessory including three rotatable rigid supports  23020 ,  23022 ,  23196 , extended in a deployed position.  FIG.  23 H  is a side view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 I  is a top perspective view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 J  is a front view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 K  is a back view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 L  is a bottom perspective view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 M  is a top view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position.  FIG.  23 N  is a bottom view of an example accessory  23010  with three rotatable rigid supports  23020 ,  23022 ,  23196 , retracted in a retained position. 
     In some implementations, one or more supports (e.g., supports  23194 ,  23196 ) are disposed in one or both of an intermediate mounting pad  23072  and a base  23016 . One or more supports (e.g., supports  23194 ,  23196 ) disposed in one of the intermediate mounting pad  23072  and the base  23016  may be substantially flexible or substantially rigid. In various implementations, one or more supports (e.g., supports  23194 ,  23196 ) disposed in one or both of the intermediate mounting pad  23072  and the base  23016  are configured for engaging one or more of a user&#39;s fingers, supporting a mobile device  23012  in a preferred display orientation, or mounting the accessory  23010  to one of a mount (not shown) and a mounting structure (not shown). 
     In some implementations, one or more supports (e.g., support  23194 ) are attached to the intermediate mounting pad  23072  as shown in  FIG.  23 A . In other implementations, one or more supports (e.g., supports  23194 ,  23196 ) are disposed in the base  23016 , as shown in  FIGS.  23 B- 23 N . In some implementations, the base  23016  includes a laterally extending base projection  23198  wherein one or more flexible and/or rigid supports (e.g., supports  23194 ,  23196 ) may be disposed. In some implementations, the base projection  23198  includes two slots (not shown) formed therethrough wherein each end of a flexible support (e.g., support  23194 ) may be attached, as shown in  FIG.  23 B . A recess (not shown) may be formed in the bottom of the base projection  23198  wherein a portion of the attached flexible support  23194  may be substantially received. 
     In some implementations, a portion of the exterior perimeter of the base projection  23198  is configured to engage with an interior portion of the support (e.g., support  23196 ) whereby the support  23196  may be disposed in retained position, as shown in  FIG.  23 C . In some implementations, the support  23196  is rotatably attached to the base projection  23198  via a pair of support arbors (not shown), rotatably disposed in a pair of recesses (not shown) formed in the sides of the base projection  23198 , as shown in  FIG.  23 C . In other implementations, one or more supports are rotatably attached to the base projection  23198  via one or more fasteners (not shown). In other implementations, one or more substantially rigid supports (e.g., support  23196 ) are rotatably connected to the base projection  23198  via a hinge  23200 , such as a living hinge, as shown in  FIG.  23 D , or a pin hinge, as shown in  FIG.  23 E . A distal portion of one or more supports (e.g., support  23196 ) disposed in one of the intermediate mounting pad  23072  and the base  23016  may be beveled. In some implementations, a distal portion of one or more supports (e.g., supports  23194 ,  23196 ) disposed in one of the intermediate mounting pad  23072  and the base  23016  may extend beyond one end of the mobile device  23012  in order to facilitate user deployment. 
     An aperture  23030  formed in one or more supports (e.g., supports  23194 ,  23196 ) and extending therethrough may be configured for receiving and engaging one or more of a user&#39;s fingers, as shown in  FIGS.  23 D- 23 G . In some implementations, a support retainer  23202  is attached to the mobile device  23012  housing, case, or cover thereof, and has an exterior perimeter configured to engage with the aperture  23030  formed in the support (e.g., support  23196 ) whereby the support  23196  may be disposed in a retained position, as shown in  FIG.  23 G . In some implementations, the support retainer  23202  is magnetic or has one or more magnetic attachment elements disposed therein. 
     In some implementations, one or more attachment elements  23088  such as a magnet or a hook-and-loop fastener may be attached to or disposed in or on a surface of the support retainer  23202  or disposed in a recess formed in a top or bottom side thereof. As shown in  FIG.  23 G , one or more attachment elements  23090  may be attached to or disposed in or on a surface of one or more of the mobile device housing  23012 , case, and cover thereof, and may be configured to mechanically, magnetically, or adhesively engage with one or more other attachment elements  23086  attached to or disposed in or on a surface of one or more of the supports (e.g., supports  23020 ,  23022 ,  23196 ) and may be configured to retain one or more of the supports  23020 ,  23022 ,  23194 ,  23196  in a retracted position. The bottom of the support retainer  23202  may be attached to the mobile device  23012 , housing, case, or cover thereof via an attachment element, such as an adhesive film. 
     In some implementations, one or more supports (e.g., support  23196 ) may be detachably attached to the accessory  23010  and secured by a plug  23028 . A support stop  23204  disposed on one end of the support  23196  may be inserted through an opening (not shown, e.g., see  22180  in  FIG.  22 A ) formed in the bottom of the base  23016  and extending through an interior and exterior perimetric face thereof and wherein longitudinal movement of the support  23196  may be restricted. One end of the support stop  23204  may be configured for engagement in a corresponding recess disposed in the bottom of the plug  23028  whereby the support  23196  may be secured to the accessory  23010  and movement of the support  23196  may be restricted by at least one degree of freedom, as shown in  FIG.  23 F . In some implementations, an exterior perimetric portion of the accessory  23010  (e.g., an exterior portion of supports  23020 ,  23022 , or cap projections  23024 ,  23026 ) may limit one or more supports (e.g., support  23196 ) rotatably disposed in one of the base  23016  and the intermediate mounting pad  23072  from rotating beyond a predetermined position, as shown in  FIG.  23 E . In other implementations, one or more slidable, rotatable, stretchable, or extendable supports (e.g., supports  23194 ,  23196 ) attached to or disposed in one or more of the base  23016 , the cap  23018 , the plug  23028 , the intermediate mounting pad  23072 , the cap projections  23024 ,  23026 , and the base projection  23198  are configured for engaging and restricting the movement of one or more other supports (e.g., supports  23020 ,  23022 ) attached to the accessory  23010  by at least one degree of freedom. 
       FIG.  24    is a top perspective view of an example accessory  24010  with a base  24016  slidably disposed inside a base track  24206 . In some implementations, the base  24016  may be disposed in a base track  24206 , as shown in  FIG.  24   . In some implementations, the base track  24206  is attached to the top of an intermediate mounting pad  24072 . An inner perimetric portion of the base track  24206  may be configured to engage with an outer perimetric portion of the base  24016 , restricting the base  24016  from moving longitudinally while enabling the base  24016  to traverse linearly along a lateral axis parallel to the two longest edges of the base track  24206 . In some implementations the inner perimeter of the base track  24206  and the outer perimeter of the base  24016  are substantially rectangular. In other implementations, the inner perimeter of the base track  24206  and the outer perimeter of the base  24016  are substantially oblong. The inner perimeter of the base track  24206  and the outer perimeter of the base  24016  may have corresponding beveled edges and one or more interior or exterior corners of one or both of the base  24016  and the base track  24206  may be rounded. In some implementations, the base track  24206  is permanently attached to the intermediate mounting pad  24072  via an adhesive layer or welding. In other implementations, the base track  24206  is detachably attached to the intermediate mounting pad  24072  via one or more fasteners. One or more portions of the base track  24206  may be hinged or separably detachable from the rest of the base track  24206  in order to allow the base  24016  to be inserted into and removed from the base track  24206 . 
     Although the invention has been discussed with reference to specific embodiments, it is apparent and should be understood that the concept can be otherwise embodied to achieve the advantages discussed. The preferred embodiments above have been described primarily as mobile device accessories for use with mobile devices such as mobile phones, however, the accessory may be used in conjunction with any mobile device capable of being held, operated, positioned, mounted, accessorized, or adapted. The foregoing description of the adaptive support accessory is presented for purposes of illustration and description. Furthermore, the description is not intended to limit the invention in any way to the form disclosed herein. 
     Accordingly, variants and modifications consistent with the following teaching, skill, and knowledge of the relevant art are within the scope of the present invention. Moreover, the accessory may be used in applications other than those specifically directed toward what are commonly regarded as mobile devices, such as carrying water bottles, or mounting picture frames. The embodiments described herein are further intended to explain modes known for practicing the invention disclosed herewith and to enable others skilled in the art to utilize the invention in equivalent or alternative embodiments and with various modifications considered necessary by the particular application(s) or use(s) of the present invention. Furthermore, structural features of different embodiments may be combined in yet another embodiment without departing from the recited claims. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.