Patent Application
20240181284
Not applicable to this application.
Example embodiments in general relate to an exercise machine with resistance selector system for use in the field of fitness training devices and exercise machines. More specifically, a resistance training machine provides for a longitudinally movable platform slidable along and parallel to one or more stationary rails extending substantially the length of the machine, with a plurality of biasing members removably attached between the stationary machine structure and the movable platform, the biasing members thereby inducing a unidirectional resistance force against the movable platform.
Exemplary embodiments described herein may provide for methods and systems for detaching or attaching one or more of a plurality of bias members from or to a movable platform at any time during exercise, and further may provide for an exercise class instructor to remotely attach or detach one or more bias members from a movable platform on one or more exercise machines in the class.
Any discussion of the related art throughout the specification should in no way be considered as an admission that such related art is widely known or forms part of common general knowledge in the field.
Those skilled in the art will appreciate that traditional resistance exercise machines with a sliding, substantially horizontal exercise platform are engineered to provide for resistance training by moving a slidable exercise platform reciprocally along one or more longitudinal rails that guide the platform's linear movement during exercise. A variable resistance force may be exerted upon the movable carriage by bias members which typically comprise a plurality of extension springs that are each removably attachable between the movable platform and the stationary structure of the machine.
Traditional machines as just described generally require an exerciser to manually attach the removably attachable end of at least one spring to the movable carriage. Thereafter, the exerciser may slide the movable carriage along the one or more longitudinal rails in a direction which lengthens the attached one or more springs so as to exert the spring resistance force against the movable platform. The process of exercisers stopping to continually attach and/or detach a plurality of springs manually during and throughout an exercise class may cause a considerable disruption to the class, and may consume valuable exercise class time that otherwise could be used for exercising. Further, the resistance force may not be changed by an exerciser or exercise class instructor while the platform is moving.
An example embodiment is directed to an exercise machine with resistance selector system. The exercise machine with resistance selector system includes a resistance exercise machine comprising a plurality of resistance springs; each spring being engaged or disengaged from a reciprocating exercise platform by one or more slide switches. The slide switches may be manipulated manually, or by actuators that extend or retract in response to instructions received from a controller.
The engagement or disengagement of any resistance spring to or from a reciprocating platform may be prevented during the performance of an exercise unless the reciprocating platform is at least momentarily stopped at the default starting point of the reciprocating cycle, regardless of when controller instructions are received, or regardless of when a switch is manually manipulated by the exerciser. Further, any actuator may override any manually engaged or disengaged switch, permitting the manual override of any actuator engaged or disengaged switch.
There has thus been outlined, rather broadly, some of the embodiments of the exercise machine with resistance selector system in order that the detailed description thereof may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional embodiments of the exercise machine with resistance selector system that will be described hereinafter and that will form the subject matter of the claims appended hereto. In this respect, before explaining at least one embodiment of the exercise machine with resistance selector system in detail, it is to be understood that the exercise machine with resistance selector system is not limited in its application to the details of construction or to the arrangements of the components set forth in the following description or illustrated in the drawings. The exercise machine with resistance selector system is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of the description and should not be regarded as limiting.
Example embodiments will become more fully understood from the detailed description given herein below and the accompanying drawings, wherein like elements are represented by like reference characters, which are given by way of illustration only and thus are not limitative of the example embodiments herein.
As shown in
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As shown in
A first actuator 134 may be connected to the first switch 119 and a second actuator 134 may be connected to the second switch 119, wherein the first actuator 134 is adapted to adjust the first switch 119 between the engaged position and the disengaged position, wherein the second actuator 134 is adapted to adjust the second switch 119 between the engaged position and the disengaged position. The first and second switches 119 may be manually adjustable. The first and the second actuator 134 may each be comprised of a solenoid 137. A remote control 206 may be used for controlling the first and the second actuator 134. The second switch 119 may be comprised of a magnet, wherein the magnet of the second switch 119 is adapted to magnetically attract the second latch 126 when the second switch 119 is in the engaged position. The second latch 126 may be adapted to pivot between the engaged position and the disengaged position.
As shown in
Various aspects of specific embodiments are disclosed in the following description and related drawings. Alternate embodiments may be devised without departing from the spirit or the scope of the present disclosure. Additionally, well-known elements of exemplary embodiments will not be described in detail or will be omitted so as not to obscure relevant details. Further, to facilitate an understanding of the description, a discussion of several terms used herein follows.
The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. Likewise, the term “embodiments” is not exhaustive and does not require that all embodiments include the discussed feature, advantage or mode of operation.
The phrase “linear actuator” is used herein to mean a device used to create linear motion by moving an extendible/retractable piston or shaft portion of an actuator relative to a stationary body of the actuator. The type of linear actuators used on the present invention described below is not intended to be limiting, and may comprise one or more types of linear actuators well known to those skilled in the art including, but not limited to mechanical, pneumatic, hydraulic, or electromechanical actuators.
The phrase “bias member” as used herein to mean a device used to apply a resistance force to a moveable platform of an exercise machine. The type of biasing member used on the present invention may in some embodiments comprise one or more extension springs, but may also comprise in other embodiments one or more of multiple types of biasing member well known to those skilled in the art including, but not limited to any elongated member capable of providing resistance, including but not limited to extension springs or elastic ropes that are removably attachable at one end to an exercise platform that moves reciprocally on and parallel to longitudinal guide rails, with the opposed end of the bias member affixed to a stationary member of the exercise machine.
Although more than one embodiment is illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a wide variety of alternate and/or equivalent implementations may be substituted for the specific embodiments shown and described without departing from the scope of the present disclosure. This application is intended to cover any adaptations or variations of the embodiments discussed herein.
A cassette manifold 110 may be affixed to the reciprocating platform 106 to provide for the attachment and detachment of one end of a plurality of bias members 115, with the opposed ends of the bias members 115 being affixed to the stationary machine 100 structure. When one or more of the bias members 115 are attached to the cassette manifold 110, they may exert a resistance force upon the reciprocating platform 106. In practice, an exerciser 300 desiring to slide the reciprocating platform 106 during exercise must exert a force upon the reciprocating platform 106 in a direction opposed to and greater than the resistance force created by the one or more bias members 115.
One exercise cycle is considered to be the movement by the exerciser 300 of the reciprocating exercise platform 106 from a starting position at which point no spring forces act upon the reciprocating platform 106, the work portion of the cycle during which the exerciser 300 moves the reciprocating platform 106 in a direction that continually lengthens all of the engaged springs until the exerciser 300 stops, and allows the springs to retract the reciprocating exercise platform 106 back to the starting position.
Although the side view illustrates a single resistance biasing assembly 111, it is preferred that the exercise machine provides for two or more resistance biasing assemblies 111.
It should be noted that in place of, or used together with the plurality of biasing assemblies 111 as just described, simple springs and/or elastic cables may be used. When simple springs and/or elastic cables are used, a first end would be preferably retained by the docking station 116 and a second end would be affixed to a distal stationary member of the exercise machine 100 structure.
As has been discussed, the cassette manifold 110 may be attached to a resistance exercise machine 100, and provides for an improved method of changing the desired exercise resistance exerted upon the reciprocating exercise platform 106 of the exercise machine 100.
The resistance selection slide switches 119 described herein introduce a method of increasing or decreasing the exercise resistance exerted upon a reciprocating exercise platform 106 by engaging one or more slide switches 119 by either manually manipulating each switch 119, and/or by manipulating each switch 119 remotely (such as by a mobile device or remote control). An exemplary embodiment of the device as will be described herein provides for the overriding of any switch state by manual manipulation, for remotely overriding any manually selected switch state, and for manually overriding any remotely selected switch state.
Yet another preferred embodiment of the device provides for the safety of engaging or disengaging each of the resistance bias members 115 only when the reciprocating platform 106 is in a stopped position at the bottom, or starting point of the reciprocation cycle, as will be described in detail. The introduction of this function provides for the safety of the exerciser 300 mounted on the reciprocating platform 106 by preventing any sudden increase or decrease in the resistance biasing force upon the reciprocating platform while the exerciser 300 is in the middle of an exercise reciprocation.
It should be noted that the following
Continuing to reference
The pull socket 121 may provide for a socket strike 125 slot through which a latch bolt 128 may enter. As shown in
A zero force latch 126 may be rotatable relative to the manifold structure 117 about a latch pivot axle 127 affixed to the manifold structure 117. The zero force latch 126 may comprise a latch dead weight 130 affixed to substantially the proximate portion of the latch bolt 128, and a ferromagnetic latch handle 129 extending upwardly from the latch 126 towards the proximity of the permanent switch magnet 131. The default position of the zero force latch 126 is shown with the proximate latch bolt 128 lowered relative to a pull socket 121 having rotated in a counterclockwise direction about the latch pivot axle 127 in response to the gravitational force acting on the latch dead weight 130. The default state of the switch position just described is referred to herein as the disengaged position.
As shown in
The state of the slide switch 119 wherein the latch bolt 128 is positioned within the socket strike slot 125 may be considered an engaged switch position.
As the manifold structure 117 moves in a direction away from the docking station 116, the socket flanged hub 124 may remain undisturbed from its default position seated in the socket berth 122. In practice, the total resistance force acting on the reciprocating exercise platform 106 will not include the resistance force that otherwise would have been provided by the spring 123 affixed to the socket flanged hub 124.
A slide switch 119 is shown in the rearward position as described in
As can be readily seen, the switch 119 and magnet 131, being in the rearward position, attract the ferromagnetic latch handle 129, rotating the latch 126 clockwise, and correspondingly, rotating the latch bolt 128 in an upward direction into the socket strike 125. The engaged latch bolt 128 and socket strike 125 therefore together as a single assembly.
As the manifold structure 117 moves in a direction away from the docking station 116, the socket flanged hub 124 may be pulled from the socket berth 122 in the same direction and distance towards the front end of the exercise machine 100 as the reciprocating platform 106 structure. In practice, the total resistance force acting on the reciprocating exercise platform 106 will therefore include the resistance force being provided by at least the engaged spring 123.
It should be noted that in the instance when an exerciser 300, during the performance of an exercise subsequent to engaging the latch bolt 128 into the socket strike 125, moves an engaged slide switch 119 to the disengaged position, the spring 123 associated with the slide switch 119 will remain engaged so long as the spring 123 force transferred to the socket strike 125 provides sufficient coupling force between the mating interior surface of the socket strike 125 and the proximate edge of the latch bolt 128 so as to prevent the unintended decoupling of the bolt 128 and strike 125.
The hatched lines indicate sectional views through a slide switch 119, cassette manifold structure 117, zero force latch 126, pull socket 121, and docking station 116. For clarity, the spring 123 and spring fastener 132 are shown in a non-sectional isometric view.
The linear actuator 134 may comprise at least an actuator body, and a linearly repositionable piston 141, the actuator 134 being responsive to electrical signals communicated through controller wires 136. The linear actuator 134 may operate in at least three modes: electrically actuated extension of the length of the piston 141 to its desired maximum extended travel position, electrically actuated retraction of the piston 141 to the minimum desired travel position, and an idle state. It is preferable that the piston 141 of the actuator 134 may be manually repositioned during the idle state.
Continuing to reference
A pull socket 121 may serve as a termination of the movable end of a resistance spring 123. A zero force latch 126 may be rotatable about a latch pivot axle 127 affixed to the manifold structure 117 by various methods. The zero force latch 126 may comprise a latch dead weight 130 affixed to substantially the proximate portion of the latch bolt 128, and a ferromagnetic latch handle 129 extending upwardly from the latch 126 towards the proximity of the permanent switch magnet 131.
The linear actuator 134 may be affixed to the manifold structure 117 by an actuator mounting member 133. An actuator linkage 135 may be pivotably attached between the proximate end of the actuator piston 141 and the proximate attaching eyelet on the underside of the slide switch 119.
The default position of the zero force latch 126 is shown with the proximate latch bolt 128 lowered relative to a pull socket 121 having rotated in a counterclockwise direction about the latch pivot axle 127 in response to the gravitational force on the latch dead weight 130, and/or responsive to the extension of the actuator piston 141. The default state of the switch position just described is referred to herein as the disengaged position.
A pull socket 121 may serve as the termination of the movable end of a resistance spring 123. When a latch bolt 128 portion of the rotatable zero force latch previously described is upwardly moved into the socket strike 125 of the pull socket 121, the pull socket 121, together with the spring 123 fastened to the socket flange hub 124, will move concurrently with and in the same direction as the reciprocating platform structure when moved by an exerciser.
The linear actuator 134 may be affixed to the manifold structure 117 an actuator mounting member 133. An actuator linkage 135 may be pivotably attached between the proximate end of the actuator piston 141 and the proximate attaching eyelet on the 24 underside of the slide switch 119.
The engaged position of the zero force latch 126 is illustrated with the latch bolt 128 having been rotated upwardly in a clockwise direction about the latch pivot axle 127 in response to the retraction of the linear actuator piston 141, and/or in response to manual manipulation of the switch 119 by the exerciser. The state of the switch 119 position just described is referred to herein as the engaged position.
As shown in
The manifold structure 117 may be attached to the reciprocating platform 106 structure as previously described. As the exerciser 300 pushes the reciprocating exercise platform 106 in a direction indicated by the arrow, the reciprocating platform 106 and manifold structure 117 may move as a single assembly, thereby increasing the dimension between the manifold structure 117 and the docking station 116 that is affixed to a stationary member of the resistance exercise machine 100. The latch bolt 128, having rotated to a position lower than the socket strike 125, may provide for the separation of the latch bolt 128 and strike 125.
As the manifold structure 117 moves in a direction away from the docking station 116, the socket flanged hub 124 remains undisturbed from its default position seated in the socket berth 122. In practice, the total resistance force acting on the reciprocating exercise platform 106 will not include the resistance force that otherwise would have been provided by the spring 123 affixed to the socket flanged hub 124.
A slide switch 119 is shown in the rearward position as described in
As can be readily seen, the switch 119 and magnet 131, having been slid in the rearward position by retracting the piston 141 of the linear actuator 134, and/or manually sliding the switch 119 in the rearward direction, decreases the distance and increases the magnetic attraction between the ferromagnetic latch handle 129 and switch magnet 131 as previously described, thereby rotating the latch 126 and latch bolt 128 in a clockwise direction. The clockwise rotation of the latch 126 causes the latch bolt 128 to be inserted into the socket strike 125. The latch bolt 128 and socket strike 125 may move together as a single assembly when engaged as just described.
As the manifold structure 117 moves in a direction away from the docking station as indicated by the arrow, the socket flanged hub 124 and resistance spring 123 may be pulled through the socket berth 122 in the same direction and distance as the reciprocating platform 106 structure. In practice, the total resistance force acting on the reciprocating exercise platform 106 will therefore include the resistance force being provided by the spring 123.
It should be noted that in the instance when an exerciser 300 or remote controller moves an engaged slide switch 119 to the disengaged position during the performance of an exercise, the latch bolt 128 may remain engaged into the socket strike 125 until the reciprocating exercise platform 106 returns to and momentarily stops at the default starting position.
The hatched lines indicate sectional views through a slide switch 119, cassette manifold structure 117, zero force latch 126, pull socket 121, solenoid 137, solenoid piston 138 and docking station 116. For clarity, the spring 123 and spring fastener 132 are shown in a non-sectional isometric view.
The solenoid 137 may comprise at least a solenoid body, and a linearly repositionable piston 138, the solenoid 137 being responsive to electrical signals communicated through controller wires 136. The solenoid 137 may operate in at least two modes: electrically actuated extension of the length of the piston 138 to its desired maximum extended travel position, and electrically actuated retraction of the piston 138 to the minimum desired travel position. The piston 138 of the solenoid 137 may also be manually repositionable when it is not being electrically excited.
Continuing to reference
A pull socket 121 may serve as a termination of the movable end of a resistance spring 123. A zero force latch 126 is rotatable about a latch pivot axle 127 as previously described. The zero force latch 126 may comprise a latch dead weight 130 affixed to substantially the proximate portion of the latch bolt 128, and a ferromagnetic latch handle 129 extending upwardly from the latch 126 towards the proximity of the permanent switch magnet 131.
The male threaded portion of a solenoid 137 may be mated to the female threaded portion through a hole in the manifold structure 117; although those skilled in the art will appreciate that any method known for affixing a solenoid 137 to a structural member may be utilized. A piston link 139 may be pivotably attached between the proximate end of the solenoid piston 138 and the attachment structure on the latch handle 129, the method of attachment not shown but may be one of many well-known methods to those skilled in the art.
The default position of the zero force latch 126 is shown with the proximate latch bolt 128 lowered relative to a pull socket 121 having rotated downwardly in a counterclockwise direction about the latch pivot axle 127 in response to the gravitational force on the latch dead weight 130, and/or responsive to the extension of the solenoid piston 138. The default state of the switch position just described is referred to herein as the disengaged position.
A pull socket 121 may serve as a termination of the movable end of a resistance spring 123 when a latch bolt 128 portion of the rotatable zero force latch 126 is upwardly moved into the socket strike 125 of the pull socket 121. The engagement of the latch bolt 128 into the socket strike 125 may provide for the pull socket 121 and the socket flange hub 124 to move concurrently with and in the same direction as the reciprocating platform structure when moved by an exerciser 300.
A solenoid 137 may be affixed to the manifold structure 117 by various methods as previously described. A piston link 139 may be pivotably attached between the proximate end of the solenoid piston 138 and the receiving structure on the latch handle 129.
The engaged position of the zero force latch 126 is shown with the latch bolt 128 having been rotated in a clockwise direction about the latch pivot axle 127 in response to the retraction of the solenoid piston 138, and/or in response to manual manipulation of the switch 119 by the exerciser 300. The state of the switch position just described is referred to herein as the engaged position.
As shown in
The manifold structure 117 may be attached to the reciprocating platform 106 structure. As the exerciser 300 pushes the reciprocating exercise platform 106 as previously described, the reciprocating platform 106 and manifold structure 117 may move as a single assembly, thereby increasing the dimension between the manifold structure 117 and the docking station 116 that is affixed to a stationary member of the resistance exercise machine 100. The latch bolt 128, having rotated to a position lower than the socket strike 125 as indicated by the arched arrow provides for the separation of the latch bolt 128 and socket strike 125.
As the manifold structure 117 moves in a direction away from the docking station 116, the socket flanged hub 124 of the pull socket 121 may remain undisturbed from its default position seated in the socket berth 122. In practice, the total resistance force acting on the reciprocating exercise platform 106 will not include the resistance force that otherwise would have been provided by the spring 123 affixed to the socket flanged hub 124.
A slide switch 119 is shown in the rearward position as described in
As can be readily seen, the switch 119 and magnet 131, having been slid into the rearward position by retracting the piston 138 of the solenoid 137, and/or manually sliding the switch 119 in the rearward direction, decreases the distance and increases the magnetic attraction between the ferromagnetic latch handle 129 and switch magnet 131 as previously described, thereby rotating the latch 126 and latch bolt 128 in a clockwise direction as indicated by the upward arched arrow. The clockwise rotation of the latch 126 may cause the latch bolt 128 to insert into the socket strike 125. The latched bolt 128 and pull socket may move together as a single assembly when engaged as just described.
As the manifold structure 117 moves in a direction away from the docking station 116, the socket flanged hub 124 and resistance spring 123 may be pulled through the socket berth 122 in the same direction and distance as the reciprocating platform 106 structure. In practice, the total resistance force acting on the reciprocating exercise platform 106 will therefore include the resistance force being provided by the spring 123.
Machine “A” 200 may comprise a power source that will supply the necessary electrical power to operate a wireless controller 203 in communication with a network 207 within an exercise facility. The class instructor may then use a controller operator 206 that is wirelessly connected to the same wireless network as the machine controllers, using well known methods of communicating over a wireless network.
In instances when a wireless network is not available, a wired controller not shown, but in wired communication with the manifold controller 203 may be used. Therefore, the manifold controller 203 may receive various digital and/or analog instructions from the operator 206; the communication comprising at least instructions that manage the operating state of each of a plurality of linear actuators 204, each of the actuators 134 controlling the locking and unlocking of each of the latch bolts 128 to or from their respective socket strikes 125 as previously described. When a control signal is not being sent to an actuator 134, the exerciser 300 may override the locked or unlocked state of the latch bolt 128 by manually sliding any or all slide switches 119 associated with each of the actuators 134.
Continuing to reference
It should be noted that various other configurations for the actuator linkage may be used whereby the latch bolt 128 will engage with the socket strike 125 when the actuator piston 141 is extended, rather than retracted as just described, and the linkage and piston 141 extension or retraction to engage or disengage the latch bolt 128 is not meant to be limiting.
As can be seen in the illustration, the Actuator 2, Actuator 5 and Actuator 8, shown as dashed lines, signifies that the actuator 204 is in an idle state, having received no signal from the controller. Therefore, the default condition of the latch bolt is that no engagement with the socket strike 125 occurs, the “extended/off” condition therefore shown as a solid line. This is an important safety consideration to ensure that no springs 123 associated with slide switches 119 in the off position are engaged.
Further, when it is preferable to remove the resistance acting upon the reciprocating exercise platform 106 that is associated with any particular spring 123, for instance, the resistance spring associated with Actuator 4 as labelled in
As previously discussed, if the controller 203 may send an “extend/off”, or “retract/on” signal to the actuator 204 with the objective of respectively disengaging or engaging the coupling of any spring resistance to the reciprocating exercise platform 106, and the instructions are received by the actuator 204 when the reciprocating exercise platform 106 is moving or otherwise positioned anywhere on the resistance exercise machine 100 other than the default starting position, the mechanical execution of the controller 203 instructions will wait until the reciprocating platform 106 has returned to the start position. The execution will therefore occur instantly during the short time period that the reciprocating exercise platform 106 has momentarily stopped at the end of one cycle prior to reversing direction to start another reciprocal cycle.
As can be seen, the representative weight variations approach 200 different weight combinations provided by changing the state of eight selector switches 119 to engaged/on, and/or disengaged/off, this vast number of combinations being substantially increased or decreased by providing a different combination of varying spring weights, or modifying the number of the plurality of resistance biasing assemblies on the machine. Therefore, describing every possible combination of switch number and spring weights to engage or disengage would be overly burdensome, but would nonetheless reinforce the commercial and functional value of the methods of instantly and simultaneously controlling the plurality of actuators 204 on a plurality of resistance exercise machines 100 during an exercise training class as fully described above.
The method of varying the exercise resistance level of a resistance exercise machine 100 as described above comprises a plurality of resistance springs 123, each spring 123 engaged or disengaged from a reciprocating exercise platform 106 by one or more slide switches 119. The slide switches 119 may be manipulated manually, or by actuators 134 that extend or retract in response to instructions received from a controller 203.
One important safety function prevents the engagement or disengagement of any resistance spring 123 to or from a reciprocating platform 106 during the performance of an exercise unless the reciprocating platform 106 is at least momentarily stopped at the default starting point of the reciprocating cycle, regardless of when controller 203 instructions are received, or regardless of when a switch 119 is manually manipulated by the exerciser 300. Further, another feature of the invention provides for any actuator 134 to override any manually engaged or disengaged switch 119, and for the manual override of any actuator 134 engaged or disengaged switch 119.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar to or equivalent to those described herein can be used in the practice or testing of the exercise machine with resistance selector system, suitable methods and materials are described above. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety to the extent allowed by applicable law and regulations. The exercise machine with resistance selector system may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive. Any headings utilized within the description are for convenience only and have no legal or limiting effect.
The present application is a continuation of U.S. application Ser. No. 17/865,494 filed on Jul. 15, 2022 (Docket No. LAGR-279), which is a continuation of U.S. Application Ser. No. 17/306,121 filed on May 3, 2021 now issued as U.S. Pat. No. 11,389,685 (Docket No. LAGR-252), which is a continuation of U.S. application Ser. No. 16/703,168 filed on Dec. 4, 2019 now issued as U.S. Pat. No. 10,994,168 (Docket No. LAGR-202), which claims priority to U.S. Provisional Application No. 62/775,034 filed Dec. 4, 2018 (Docket No. LAGR-142). Each of the aforementioned patent applications is herein incorporated by reference in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| 62775034 | Dec 2018 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 17865494 | Jul 2022 | US |
| Child | 18441664 | US | |
| Parent | 17306121 | May 2021 | US |
| Child | 17865494 | US | |
| Parent | 16703168 | Dec 2019 | US |
| Child | 17306121 | US |
