PATENT DOCUMENT

Publication Number: US-8873790-B2
Application Number: US-201113175588-A
Country: US
Kind Code: B2

Title: Non-occluding earbuds and methods for making the same

Abstract:
Non-occluding earbuds and methods for making the same are disclosed. The earbud has a non-occluding housing having a directional port positioned offset with respect to a center axis of the housing. The directional port may be constructed to project acoustic signals into the user&#39;s ear canal. In addition, the directional port can include separate openings or ports for different front volumes existing within the housing. Front and back volumes can exist for each speaker contained within the housing, and embodiments of this invention use a midmold structure that enables the front volumes to be tuned independently of each other.

Claims:
What is claimed is: 
     
       1. An earbud, comprising:
 a housing comprising non-occluding and neck members, the non-occluding member comprising a first part coupled to a second part, the first part comprising a directional port and an inner wall; 
 a midmold secured to the inner wall of the first part of the non-occluding member, wherein the second part is coupled to the first part to form at least a portion of the housing; 
 a first speaker mounted to the midmold such that a front acoustic volume and a back acoustic volume exist within the housing, the front acoustic volume interfacing with the directional port, wherein the geometry of the front acoustic volume is defined by the midmold but not by the housing; and 
 a second speaker mounted to the midmold and acoustically isolated from the front and back volumes, the second speaker operative to direct acoustic signals directly through the directional port. 
 
     
     
       2. The earbud of  claim 1 , wherein the midmold is not touching any portion of the second part of the non-occluding member when the housing is formed. 
     
     
       3. The earbud of  claim 1 , wherein the non-occluding member comprises an asymmetric shape. 
     
     
       4. The earbud of  claim 1 , wherein the midmold comprises:
 a first recess for receiving the second speaker; and 
 at least one conductor via. 
 
     
     
       5. The earbud of  claim 1 , wherein the first speaker is a woofer and the second speaker is a tweeter. 
     
     
       6. The earbud of  claim 1 , wherein the directional port comprises a first speaker port and a second speaker port, and wherein the front volume interfaces with the first speaker port and a front volume of the second speaker interfaces with the second speaker port. 
     
     
       7. The earbud of  claim 6 , wherein the first and second speaker ports are separate. 
     
     
       8. The earbud of  claim 1 , wherein the housing comprises a port that interfaces with the back acoustic volume. 
     
     
       9. A non-occluding earbud, comprising:
 a non-occluding housing comprising a first part and a second part coupled to the first part, the first part comprising a directional port; and 
 a sub-assembly fixed within the housing to only the first part and not to the second part, the sub-assembly comprising at least two dynamic drivers, each one of the at least two dynamic drivers comprising respective acoustic front volumes that are isolated from each other within the housing and interface with the directional port, wherein the non-occluding housing does not form any portion of any one of the acoustic front volumes. 
 
     
     
       10. The earbud of  claim 9 , wherein the non-occluding housing is asymmetric. 
     
     
       11. The earbud of  claim 9 , wherein the non-occluding housing comprises a center axis and a center axis of the directional port is offset with respect to the center axis. 
     
     
       12. The earbud of  claim 9 , wherein the sub-assembly further comprises:
 a midmold fixed to an inner surface of the housing, wherein the at least two drivers are mounted to the midmold, and wherein a first driver of the at least two drivers and the midmold form the acoustic front volume of the first driver. 
 
     
     
       13. The earbud of  claim 12 , wherein the directional port comprises at least two ports that are acoustically isolated from each other, wherein a first port of the at least two ports form part of the acoustic front volume of a second driver of the at least two drivers. 
     
     
       14. The earbud of  claim 13 , further comprising a seal that acoustically couples the first port to the second driver. 
     
     
       15. The earbud of  claim 13 , wherein the acoustic front volume of the first driver interfaces with a second port of the at least two ports. 
     
     
       16. The earbud of  claim 9 , wherein the directional port has an annular shape. 
     
     
       17. The earbud of  claim 16 , wherein the directional port comprises a concentric port and a plurality ports positioned around the concentric port. 
     
     
       18. A headset comprising:
 a plug; 
 a cable structure comprising first, second, and third legs, the first leg coupled to the plug, the second leg coupled to a left non-occluding earbud, and the third leg coupled to a right non-occluding earbud; and 
 wherein each one of the left and right non-occluding earbuds comprises:
 dual dynamic drivers each comprising an independently tuned acoustic front volume that interfaces with a driver-specific port, wherein the dual dynamic drivers comprise a woofer and a tweeter; 
 a non-occluding housing comprising a first part and a second part coupled to the first part, the first part comprising the driver-specific ports; and 
 a midmold that is fixed to the woofer and tweeter, the midmold and woofer forming the entirety of the front volume of the woofer. 
 
 
     
     
       19. The headset of  claim 18 , wherein the front volume and driver specific port of the woofer are acoustically separate from the front volume and driver specific port of the tweeter. 
     
     
       20. The headset of  claim 18 , wherein the housing of each earbud further comprises a housing having an asymmetric shape. 
     
     
       21. A method for making an earbud, comprising:
 fixing first and second speakers to a midmold to provide a sub-assembly; 
 mounting the sub-assembly to an interior surface of a first part of a housing; and 
 coupling the first part of the housing to a second part of the housing after the mounting, wherein the midmold and the first speaker form the entirety of a front volume of the first speaker. 
 
     
     
       22. The method of  claim 21 , wherein the housing comprises a non-occluding member having a directional port offset from a center axis of the housing, the method further comprising:
 acoustically sealing the second speaker to a portion of the directional port to form a front volume for the second speaker. 
 
     
     
       23. The method of  claim 21 , wherein the midmold comprises at least one conductor via, the method further comprising:
 applying a sealant to the at least one conductor via.

Description:
BACKGROUND 
     Headsets are commonly used with many portable electronic devices such as portable music players and mobile phones. Headsets can include non-cable components such as a jack, headphones, and/or a microphone and one or more cables that interconnect the non-cable components. Other headsets can be wireless. The headphones—the component that generates sound—can exist in many different form factors such as over-the-ear headphones or as in-the-ear or in-the-canal earbuds. In-the-ear earbuds are sometimes referred to as non-occluding earbuds as they generally do not form an airtight seal with the user&#39;s ear. The absence of an airtight seal can affect the earbud&#39;s acoustic performance, especially when two or more speakers are used. Accordingly, what is needed is a non-occluding earbud having two or more speakers and that provides high quality sound. 
     SUMMARY 
     Non-occluding earbuds and methods for making the same are disclosed. The earbud has a non-occluding housing having a directional port positioned offset with respect to a center axis of the housing. The directional port may be constructed to project acoustic signals into the user&#39;s ear canal. In addition, the directional port can include separate openings or ports for different front volumes existing within the housing. Front and back volumes can exist for each speaker contained within the housing, and embodiments of this invention use a midmold structure that enables the front volumes to be tuned independently of each other. The speakers are mounted to the midmold, which is fixed to an inner surface of the housing. The midmold has a cavity shaped to tune the front volume of one of the speakers. For example, in one embodiment, the cavity can form part of the front volume for a woofer speaker. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects and advantages of the invention will become more apparent upon consideration of the following detailed description, taken in conjunction with accompanying drawings, in which like reference characters refer to like parts throughout, and in which: 
         FIGS. 1A-D  show illustrative views of an earbud in accordance with an embodiment of the invention; 
         FIG. 2  shows an illustrative cross-sectional view of the earbud of  FIG. 1  in accordance with an embodiment of the invention; 
         FIGS. 3A-F  show several illustrative views of a midmold in accordance with an embodiment of the invention; 
         FIGS. 4A-E  show illustrative views of a sub-assembly in accordance with an embodiment of the invention; 
         FIG. 5  shows an illustrative process of an embodiment of the invention; and 
         FIGS. 6A-B  show illustrative views of wired headsets in accordance with embodiments of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     Headphones or earbuds for use in headsets are disclosed. Earbuds according to embodiments of this invention include a non-occluding housing having a directional port offset with respect to a center axis of the earbud. The housing can have an asymmetric shape amenable to in-the-ear retention, but does not form an air-tight seal with the user&#39;s ear or ear canal. The absence of an air-tight seal requires that the front volume for each speaker (or dynamic driver) be specifically tuned to achieve a desired frequency response. Embodiments of this invention use a midmold structure within the housing to form a portion of the front volume for at least one of the speakers. The midmold is fixed to an inner surface of the housing and has its internal cavity shaped to provide a desired front volume for a speaker, regardless of the shape of the housing. 
       FIGS. 1A-D  show several illustrative views of earbud  100  in accordance with an embodiment of the invention. In particular,  FIGS. 1A-D  show side, front, top, and perspective views of earbud  100 , respectively. As shown, earbud  100  is a non-occluding earbud that is asymmetrically shaped along at least two orthogonal axes. Earbud  100  includes non-occluding member  110 , directional port  112 , neck member  120 , and strain relief member  130 . Directional port  112  is positioned offset with respect to center axis  150 . Directional port  112  is offset so that when earbud  100  is placed in a user&#39;s ear, directional port  112  is positioned to direct sound directly into the user&#39;s ear canal. Earbud  100  can also include one or more speakers, a mid-mold, and a printed circuit board (none of which are shown). 
     Non-occluding member  110  is designed to fit in the ear of a user in a non-occluding manner. Non-occluding earbuds are generally designed not to form an airtight seal between the ear (or ear canal) and the outer surface of the earbud. By way of contrast, occluding earbuds are generally designed to fit inside of the user&#39;s ear canal and form a substantially airtight seal. The absence of an air-tight seal requires that the front volume for each speaker (or dynamic driver) be specifically tuned to achieve a desired frequency response. 
     Non-occluding member  110  can include two parts that are coupled together and cosmetically finished to provide the illusion that member  100  is a single piece construction. The two-part construction of member  110  is needed so that a speaker subassembly (e.g., an assembly including a midmold, speakers, and circuitry) can be installed in earbud  100 . 
     In embodiments of this invention, the front volumes of each speaker are isolated from each other within the housing. This provides for easier tuning of each speaker. Although acoustic signals generated by each speaker are isolated from each other when passing through their respective front volumes, the signals may mix when they pass through directional port  112 , and in particular, through ports  156  and  162  (also shown in  FIG. 2 ), which form part of directional port  112 . Ports  156  and  162  can take any suitable shape and can include one or more ports. As shown, port  162  can be annular in shape and surrounded by one or more of ports  156 . 
       FIG. 2  shows a cross-sectional view of earbud  100  taken along lines A-A of  FIG. 1B . As shown, earbud  100  includes midmold  140 , woofer  150 , front volume  152 , back volume  154 , and tweeter  160 . Both woofer  150  and tweeter  160  are fixed to midmold  140  as shown. Midmold  140  is fixed to an inner surface of housing  110  and has a cavity to provide front volume  152  for woofer  150 . Midmold  140  can be constructed to provide front volume  152  of any predetermined size, regardless of the shape of housing  110 . Front volume  152  is acoustically isolated from back volume  154  and tweeter  160 . Sealant  157  further ensures that front volume  152  is isolated from back volume  154  even though conductors are routed through conductor vias (not shown) extending through midmold  140 . Back volume  154  may be exposed to an ambient environment via port  170 . 
     Tweeter  160  is operative to project acoustic energy through tweeter port  162 , which forms part of directional port  112 . Center axis  161  of tweeter  160  may be aligned offset with respect to center axis  163  of tweeter port  162 . In another embodiment, axes  161  and  163  can be co-linearly aligned. Acoustic energy provided by woofer  150  can be projected through one or more woofer ports  156 , which also form part of directional port  112  and which are also disposed around tweeter port  162 . 
     Tweeter port  162  can be a hollow-shaped structure such as a cylinder that extends into housing  110  towards tweeter  160 . The structure engages seal  166  which couples port  162  to tweeter  160 . Seal  166  may be any suitable seal such as a compressible seal. When tweeter  160  is coupled to port  162 , the free space existing within the port structure forms part of the tweeter&#39;s front volume. 
     Referring now to  FIGS. 3A-F , several illustrative views of a midmold constructed in accordance with an embodiment of the invention are shown. In particular,  FIGS. 3A-E  show illustrative side, top, front, top perspective, and bottom perspective views of midmold  300 , respectively.  FIG. 3F  shows an illustrative cross-sectional view taken along line A-A of  FIG. 3B . Midmold  300  has first recess  310  for receiving a tweeter (e.g., tweeter  160  of  FIG. 2 ) and conductor vias  312  for enabling passage of conductors therethrough. Midmold  300  has second recess  320  for receiving a woofer (e.g., woofer  150  of  FIG. 2 ). Midmold  300  can be constructed from a plastic such as a thermoplastic and can be injection molded. 
     Referring now to  FIGS. 4A-E , several illustrative views of subassembly  400  including midmold  410 , woofer  420 , and tweeter  430 , are shown. In particular,  FIGS. 4A-D  show side, top, front, and perspective views of subassembly  400 , respectively.  FIG. 4E  shows an illustrative cross-sectional view taken along line A-A of  FIG. 4B . When woofer  420  is fixed to midmold  410 , front volume  422  is provided in the space existing between midmold  410  and woofer  420 . To ensure front volume  422  is acoustically isolated from a back volume (not shown), glue  440  may be disposed over conductor vias (not shown) to ensure no leakage exists where the tweeter conductors pass through midmold  410 . 
       FIG. 5  shows an illustrative process for manufacturing an earbud according to an embodiment of the invention. Starting with step  510 , a sub-assembly is provided by fixing first and second speakers to a midmold. The midmold can be, for example, midmold  140  of  FIG. 2  and the first and second speakers can be a woofer and a tweeter, respectively. Conductors may be routed through one or more conductor vias existing in the midmold and connected to one or both of the speakers. 
     At step  520 , the sub-assembly is mounted to an interior surface of a housing, the midmold and housing forming at least a portion of a front volume of the first speaker. The housing may be, for example, housing  110  of  FIGS. 1 and 2 , and includes a directional port. When the sub-assembly is mounted within the housing, an acoustic seal is formed between the second speaker and a portion of the directional port. The directional port and seal form a front volume for the second speaker. 
     Earbuds according to embodiments of the invention can be included as part of a headset such as a wired headset or a wireless headset. An example of a wired headset is discussed below in connection with the description accompanying  FIGS. 6A &amp; 6B . A wireless headset can include, for example, a Bluetooth headset. 
       FIG. 6A  shows an illustrative headset  600  having cable structure  620  that seamlessly integrates with non-cable components  640 ,  642 ,  644 . For example, non-cable components  640 ,  642 , and  644  can be a male plug, left headphones, and right headphones, respectively. As a specific example, components  642  and  644  can be an earbud having a midmold based subassembly contained therein according to embodiments of the invention. Cable structure  620  has three legs  622 ,  624 , and  626  joined together at bifurcation region  630 . Leg  622  may be referred to herein as main leg  622 , and includes the portion of cable structure  620  existing between non-cable component  640  and bifurcation region  630 . In particular, main leg  622  includes interface region  631 , bump region  632 , and non-interface region  633 . Leg  624  may be referred to herein as left leg  624 , and includes the portion of cable structure  620  existing between non-cable component  642  and bifurcation region  630 . Leg  626  may be referred to herein as right leg  626 , and includes the portion of cable structure  620  existing between non-cable component  644  and bifurcation region  630 . Both left and right legs  624  and  626  include respective interface regions  634  and  637 , bump regions  635  and  638 , and non-interface regions  636  and  639 . 
     Legs  622 ,  624 , and  626  generally exhibit a smooth surface throughout the entirety of their respective lengths. Each of legs  622 ,  624 , and  626  can vary in diameter, yet still retain the smooth surface. 
     Non-interface regions  633 ,  636 , and  639  can each have a predetermined diameter and length. The diameter of non-interface region  633  (of main leg  622 ) may be larger than or the same as the diameters of non-interface regions  636  and  639  (of left leg  624  and right leg  626 , respectively). For example, leg  622  may contain a conductor bundle for both left and right legs  624  and  626  and may therefore require a greater diameter to accommodate all conductors. In some embodiments, it is desirable to manufacture non-interface regions  633 ,  636 , and  639  to have the smallest diameter possible, for aesthetic reasons. As a result, the diameter of non-interface regions  633 ,  636 , and  639  can be smaller than the diameter of any non-cable component (e.g., non-cable components  640 ,  642 , and  644 ) physically connected to the interfacing region. Since it is desirable for cable structure  620  to seamlessly integrate with the non-cable components, the legs may vary in diameter from the non-interfacing region to the interfacing region. 
     Bump regions  632 ,  635 , and  638  provide a diameter changing transition between interfacing regions  631 ,  634 , and  637  and respective non-interfacing regions  633 ,  636 , and  639 . The diameter changing transition can take any suitable shape that exhibits a fluid or smooth transition from any interface region to its respective non-interface region. For example, the shape of the bump region can be similar to that of a cone or a neck of a wine bottle. As another example, the shape of the taper region can be stepless (i.e., there is no abrupt or dramatic step change in diameter, nor a sharp angle at an end of the bump region). Bump regions  632 ,  635 , and  638  may be mathematically represented by a bump function, which requires the entire diameter changing transition to be stepless and smooth (e.g., the bump function is continuously differentiable). 
     Interface regions  621 ,  634 , and  637  can each have a predetermined diameter and length. The diameter of any interface region can be substantially the same as the diameter of the non-cable component it is physically connected to, to provide an aesthetically pleasing seamless integration. For example, the diameter of interface region  621  can be substantially the same as the diameter of non-cable component  640 . In some embodiments, the diameter of a non-cable component (e.g., component  640 ) and its associated interfacing region (e.g., region  631 ) are greater than the diameter of the non-interface region (e.g., region  633 ) they are connected to via the bump region (e.g., region  632 ). Consequently, in this embodiment, the bump region decreases in diameter from the interface region to the non-interface region. 
     In another embodiment, the diameter of a non-cable component (e.g., component  640 ) and its associated interfacing region (e.g., region  631 ) are less than the diameter of the non-interface region (e.g., region  633 ) they are connected to via the bump region (e.g., region  632 ). Consequently, in this embodiment, the bump region increases in diameter from the interface region to the non-interface region. 
     The combination of the interface and bump regions can provide strain relief for those regions of headset  610 . In one embodiment, strain relief may be realized because the interface and bump regions have larger dimensions than the non-interface region and thus are more robust. These larger dimensions may also ensure that non-cable portions are securely connected to cable structure  620 . Moreover, the extra girth better enables the interface and bump regions to withstand bend stresses. 
     The interconnection of legs  622 ,  624 , and  626  at bifurcation region  630  can vary depending on how cable structure  620  is manufactured. In one approach, cable structure  620  can be a single-segment unibody cable structure. In this approach all three legs are manufactured jointly as one continuous structure and no additional processing is required to electrically couple the conductors contained therein. That is, none of the legs are spliced to interconnect conductors at bifurcation region  630 , nor are the legs manufactured separately and then later joined together. Some single-segment unibody cable structures may have a top half and a bottom half, which are molded together and extend throughout the entire unibody cable structure. For example, such single-segment unibody cable structures can be manufactured using injection molding and compression molding manufacturing processes (discussed below in more detail). Thus, although a mold-derived single-segment unibody cable structure has two components (i.e., the top and bottom halves), it is considered a single-segment unibody cable structure for the purposes of this disclosure. Other single-segment unibody cable structures may exhibit a contiguous ring of material that extends throughout the entire unibody cable structure. For example, such a single-segment cable structure can be manufactured using an extrusion process. 
     In another approach, cable structure  620  can be a multi-segment unibody cable structure. A multi-segment unibody cable structure may have the same appearance of the single-segment unibody cable structure, but the legs are manufactured as discrete components. The legs and any conductors contained therein are interconnected at bifurcation region  630 . The legs can be manufactured, for example, using any of the processes used to manufacture the single-segment unibody cable structure. 
     The cosmetics of bifurcation region  630  can be any suitable shape. In one embodiment, bifurcation region  630  can be an overmold structure that encapsulates a portion of each leg  622 ,  624 , and  626 . The overmold structure can be visually and tactically distinct from legs  622 ,  624 , and  626 . The overmold structure can be applied to the single or multi-segment unibody cable structure. In another embodiment, bifurcation region  630  can be a two-shot injection molded splitter having the same dimensions as the portion of the legs being joined together. Thus, when the legs are joined together with the splitter mold, cable structure  620  maintains its unibody aesthetics. That is, a multi-segment cable structure has the look and feel of single-segment cable structure even though it has three discretely manufactured legs joined together at bifurcation region  630 . Many different splitter configurations can be used, and the use of some splitters may be based on the manufacturing process used to create the segment. 
     Cable structure  620  can include a conductor bundle that extends through some or all of legs  622 ,  624 , and  626 . Cable structure  620  can include conductors for carrying signals from non-cable component  640  to non-cable components  642  and  644 . Cable structure  620  can include one or more rods constructed from a superelastic material. The rods can resist deformation to reduce or prevent tangling of the legs. The rods are different than the conductors used to convey signals from non-cable component  640  to non-cable components  642  and  644 , but share the same space within cable structure  620 . Several different rod arrangements may be included in cable structure  620 . 
     In yet another embodiment, one or more of legs  622 ,  624 , and  626  can vary in diameter in two or more bump regions. For example, the leg  622  can include bump region  632  and another bump region (not shown) that exists at leg/bifurcation region  630 . This other bump region may vary the diameter of leg  622  so that it changes in size to match the diameter of cable structure at bifurcation region  630 . This other bump region can provide additional strain relief. 
     In some embodiments, another non-cable component can be incorporated into either left leg  24  or right leg  626 . As shown in  FIG. 6B , headset  660  shows that non-cable component  646  is integrated within leg  626 , and not at an end of a leg like non-cable components  640 ,  642  and  644 . For example, non-cable component  646  can be a communications box that includes a microphone and a user interface (e.g., one or more mechanical or capacitive buttons). Non-cable component  646  can be electrically coupled to non-cable component  640 , for example, to transfer signals between communications box  646  and one or more of non-cable components  640 ,  642  and  644 . 
     Non-cable component  646  can be incorporated in non-interface region  639  of leg  626 . In some cases, non-cable component  646  can have a larger size or girth than the non-interface regions of leg  26 , which can cause a discontinuity at an interface between non-interface region  639  and communications box  646 . To ensure that the cable maintains a seamless unibody appearance, non-interface region  639  can be replaced by first non-interface region  650 , first bump region  651 , first interface region  652 , communications box  646 , second interface region  653 , second bump region  654 , and second non-interface region  655 . 
     Similar to the bump regions described above in connection with the cable structure of  FIG. 6A , bump regions  651  and  654  can handle the transition from non-cable component  646  to non-interface regions  650  and  655 . The transition in the bump region can take any suitable shape that exhibits a fluid or smooth transition from the interface region to the non-interface regions. For example, the shape of the taper region can be similar to that of a cone or a neck of a wine bottle. 
     Similar to the interface regions described above in connection with the cable structure of  FIG. 6A , interface regions  652  and  653  can have a predetermined diameter and length. The diameter of the interface region is substantially the same as the diameter of non-cable component  646  to provide an aesthetically pleasing seamless integration. In addition, and as described above, the combination of the interface and bump regions can provide strain relief for those regions of headset  660 . 
     In some embodiments, non-cable component  646  may be incorporated into a leg such as leg  626  without having bump regions  651  and  654  or interface regions  652  and  653 . Thus, in this embodiment, non-interfacing regions  650  and  655  may be directly connected to non-cable component  646 . 
     Cable structures  620  can be constructed using many different manufacturing processes. The processes discussed herein include those that can be used to manufacture the single-segment unibody cable structure or legs for the multi-segment unibody cable structure. In particular, these processes include injection molding, compression molding, and extrusion. Embodiments of this invention use compression molding processes to manufacture a single-segment unibody cable structure or multi-segment unibody cable structures. 
     In one embodiment, a cable structure can be manufactured by compression molding two urethane sheets together to form the sheath of the cable structure. Using this manufacturing method, the finished cable structure has a bi-component sheath that encompasses a resin and a conductor bundle. The resin further encompasses the conductor bundle and occupies any void that exists between the conductor bundle and the inner wall of the bi-component cable. In addition, the resin secures the conductor bundle in place within the bi-component sheath. 
     The described embodiments of the invention are presented for the purpose of illustration and not of limitation.

Metadata:
Filing Date: 20110701
Publication Date: 20141028
Grant Date: 20141028
Priority Date: 20110701
Inventors: HAYASHIDA JEFFREY
AASE JONATHAN
HOENIG JULIAN
Assignee: APPLE INC
CPC Classifications: [{"code": "Y10T29/49005", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R1/2811", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/26", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R31/006", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/345", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R2460/09", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R1/1016", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R1/345", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R31/006", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/26", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R1/2811", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1016", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R2460/09", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 46598932