Patent Abstract:
A sheath, or an encapsulated sheath, within tablet computers, smart phones, and similar electronic devices, or with enclosures for such electronic devices that would enable the seamless latching and unlatching of electronic pens of various sizes and thicknesses to such devices, or enclosures to such devices, through the pens&#39; integrated flexible clips.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit U.S. Provisional Patent Application No. 62/239,687 filed Oct. 9, 2015, which is incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The technology herein relates to a mechanical design for the efficient attachment and detachment of electronic pens and pencils of various sizes and thicknesses to electronic tablets, computers, personal information devices and other display and input devices of various sizes and thicknesses. 
     BACKGROUND OF THE INVENTION 
     With Microsoft&#39;s™ introduction of the Microsoft Pen™ with their line of Surface Pro™ computers in February 2013 and the September 2015 introduction of the Apple Pencil™ for the iPad Pro™, electronic pens and pencils have gone mainstream. Yet, three years after the introduction of the Microsoft Pen™, the way to attach and detach an electronic pen to an electronic tablet remains either through a fabric loop that attaches to the back of the tablet or to the back of a keyboard cover that attaches to the tablet, or more recently, with the introduction of the Microsoft Surface Pro 4™ and the Microsoft Surface Book™, by attaching the pen magnetically to one side of the tablet. However, attaching an electronic pen to a tablet magnetically makes it very easy for the pen to be knocked out, dropped, and lost. Moreover, Apple™ has not announced any attachment mechanism that would secure its Apple Pencil™ to its associated iPad Pro™ in any manner. In fact, the new Apple Pencil™, while an amazing piece of art and technology, does not even include a clip. Without a clip, an electronic pen or pencil is prone to roll over smooth resting surfaces, fall to the ground, and if not noticed, get forgotten and lost. 
     In addition, losing an electronic pen or pencil that cost anywhere from $50 to $100 may not only be costly, it may also amount to a major nuisance and a substantial loss of productivity until a replacement had been obtained. 
     Since most electronic tablets designed for professional use, and even new generations of smart phones, are expected to support an electronic pen or pencil in the future, it is only natural to expect that these tablets also include a simple coupling mechanism that would fasten and unfasten such pens and pencils from their associated tablets and smart phones quickly, securely, and conveniently. 
     SUMMARY OF THE INVENTION 
     The invention that I conceived and disclose may be embodied to solve one, some, or all of the problems mentioned above by adding a clip with a pointed triangularly shaped protrusion “nose”, or depression, at the tip of the clip that is either magnetic or affected by magnetism and a matching, but slightly wider, corresponding well or sheath, at the side of the accompanying electronic tablet that includes a corresponding matching nose or depression. The electronic pen can then be attached “latched” and detached “unlatched” from its accompanying tablet by inserting the pen&#39;s clip into the matching sheath that is built into the tablet. The pen can be securely fastened, or latched, into the tablet once the magnetized triangularly shaped protrusion or depression rests in the corresponding metallic protrusion or depression on the side of the sheath or well, making the electronic pen unlikely to slide out of its sheath or well even when the tablet is held upside down. 
     If this approach is implemented by tablet manufacturers, the length and width of the pen clip and its matching sheath may become standard for all tablet manufacturers thereby allowing interchangeability of electronic pens of various lengths, thicknesses, and manufacturers. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a three-dimensional perspective front view of a tablet computer with a sheath and an electronic pen attachable to the latch. 
         FIG. 2  shows a three-dimensional perspective side view of an electronic pen and a matching sheath where the sheath is encased into its own enclosure that may be independent from an electronic tablet or personal information display device. 
         FIG. 3  shows an alternative three-dimensional perspective view of an electronic pen and a matching encased sheath that reveals an opening for the encased sheath to receive the clip of an electronic pen that uses a triangular protrusion at the tip of the clip for latching the pen to the sheath. 
         FIG. 4  shows an alternative three-dimensional perspective side view of an electronic pen with an encapsulated matching sheath that uses an inverse magnetic locking mechanism with a depression rather than a protrusion at the tip of the clip for latching the pen to the sheath. 
         FIG. 5  shows an alternative three-dimensional perspective view of an electronic pen and matching encapsulated sheath that highlights the simplicity of the opening of the encapsulated sheath. 
         FIG. 6  illustrates how the encapsulated sheath can be fitted in the case of an electronic tablet or a personal information display and input device, or into the protective case of an electronic tablet or a personal information display and input device. 
         FIG. 7  illustrates a three-dimensional perspective view of an encapsulated sheath that is fully integrated into the case of an electronic tablet or personal information display and input device, or into the protective case of an electronic tablet or personal information display and input device. 
         FIG. 8  illustrates a three-dimensional perspective view of an electronic pen coupled to an encapsulated sheath seated on the side of an electronic tablet or personal information display and input device, or inside the protective case of an electronic tablet or personal information display and input device. 
         FIG. 9  illustrates an alternative view of a three-dimensional perspective view of an electronic pen coupled to an encapsulated sheath seated on the side of an electronic tablet or personal information display and input device, or inside the protective case of an electronic tablet or personal information display and input device. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows an exemplary electronic tablet computer  10  with a sheath  12  and an electronic pen  14  attachable to the sheath. The tablet computer  10  may have a touch sensitive digital display screen  16  configured to sense as an input the tip  18  of the electronic pen. A tablet computer with a touch sensitive digital display screen may be viewed as conventional for purposes of the disclosure of this invention. The tablet computer may also be a cellular smart phone, personal digital assistant, electronic book or other similar portable electronic device (collectively referred to as an electronic display device) in which an electronic pen may be used as an input device. 
     The housing  20  for the tablet computer  10  may be formed of plastic or metal and provide a protective casing for the electronic components in the housing and for the display screen  16 . The housing includes a side edge  22  that may, for example, have a height of greater than eight inches and a thickness in the range of 3 millimeters to an inch and one half. These dimensions are exemplary and depend on the type, model, and manufacturer of the tablet computer. 
     The side edge of the housing is configured to include the sheath  12 . The sheath may be an elongated slot, chamber, recess or other structure configured to receive the electronic pen. The sheath may be open at both ends, shorter in length, or longer in length than the clip, integrated into the side edge  22  of the housing  20  for the tablet computer, or encapsulated in an enclosure that may be completely independent of the housing  20  of the exemplary electronic tablet  10 . The clip  24  of the pen may be made of a pliable material, such as plastic or metal, that can easily bend and slide into an opening  26  of the sheath  12  and enters the sheath. A finger  28  of the sheath slides between the clip  24  and the body of the pen  15 . The finger  28  may have a length longer than the length of the clip. A latch  30  on an interior surface of the finger engages an end region  32  of the clip  24 . The latch may be a magnet that holds the end region  32  of the clip  24 . The latch  30  may be a protrusion or a recess that engages with a nose or a depression on the end region  32  of the clip  24 . When secured to the sheath  12 , the pen  14  is held to the side edge  22  of the tablet computer by the engagement between the sheath  12  and the clip  24 . 
       FIG. 2  illustrates an exemplary embodiment of how the sheath  12  may be encapsulated in an enclosure  36  that may be completely independent of the housing  20  of the exemplary electronic tablet  10  of  FIG. 1 . 
       FIG. 3  shows an alternative three-dimensional perspective view of an electronic pen  14  and a matching encapsulated sheath  12  that reveals an opening  26  for the encased sheath  12  to receive the clip  24  of an electronic pen  14  that uses a triangular protrusion  32  at the tip of the clip for latching the pen  14  to the latch  30  of the sheath  12 . 
       FIG. 4  shows an alternative three-dimensional perspective side view of an electronic pen  14  with an encapsulated matching sheath  12  that uses an inverse magnetic locking mechanism with a depression  33  rather than a protrusion at the tip of the clip for latching the pen  14  to the latch  31  of sheath  12 . 
       FIG. 5  shows an alternative three-dimensional perspective view of an electronic pen  14  and matching encapsulated sheath that highlights the simplicity of the opening  26  of the encapsulated sheath. 
       FIG. 6  illustrates a three-dimensional perspective view of how the independent sheath enclosure  36  can be fitted into the case  20  of an electronic tablet or personal information display device  10 , or into the protective case of an electronic tablet or a personal information display device. The independent sheath enclosure  36  may be attached to the side edge  22  of the tablet computer  10  by mechanical means or by gluing it directly into the side edge  22  of the tablet computer. 
       FIG. 7  illustrates an alternative three-dimensional perspective view of an encapsulated sheath that is fully integrated into the case  20  of an electronic tablet  10  that reveals the opening  26  of the encased sheath for receiving the clip  24  of electronic pen  14 . 
       FIG. 8  illustrates yet another three-dimensional perspective view of an electronic pen  14  coupled to an independent sheath enclosure  36  that is seated on the side of an electronic tablet or personal information display device  10 , or inside the protective case of an electronic tablet or personal information display and input device  10 . 
       FIG. 9  illustrates yet another alternative three-dimensional perspective view of an electronic pen  14  coupled to a sheath seated on the side of an electronic tablet or personal information display and input device  10 , or inside the protective case of an electronic tablet or personal information display and input device, though the opening  26  of a fully integrated or independently encapsulated sheath  12 . 
     The invention may be embodied as a sheath with a latch; the latch may be magnetic or mechanical, or both. The sheath may be open on both ends, or closed on one end; it may be shorter than the length of the clip, about equal in size, or longer; it may be integrated into the side edge of the housing for the tablet computer (or a protective case of an electronic tablet or personal information display and input device), or encapsulated in an enclosure that may be completely independent of the housing of the exemplary electronic tablet (or a protective case of an electronic tablet or personal information display and input device). 
     While exemplary embodiments of the invention are disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms “comprise” or “comprising” do not exclude other elements or steps, the terms “a” or “one” do not exclude a plural number, and the term “or” means either or both. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise.

Technology Classification (CPC): 5