Exhibit 2

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 1 of 22 PageID #: 36
EVIDENCE OF USE FOR U.S. PATENT NO. 8,614,667

Title: Apparatus and method for generating data signals

Application No.: US 11/426,861

Filing Date: June 27, 2006

Issue Date: December 24, 2013

Accused Product:

Source: https://shop.8bitdo.com/products/8bitdo-sn30-pro-bluetooth-gamepad-gray-edition---nintendo-switch

1

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 2 of 22 PageID #: 37
Evidence of Use 

Claim Language Evidence of Infringement

10. An apparatus for

generating a data

signal, the apparatus

comprising:

The 8Bitdo SN30 Pro is a wireless Bluetooth game controller designed for use with a variety of

gaming devices, including smartphones, tablets, PCs, and gaming consoles.

Source: https://shop.8bitdo.com/products/8bitdo-sn30-pro-bluetooth-gamepad-gray-edition---

nintendo-switch

2

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 3 of 22 PageID #: 38
Claim Language Evidence of Infringement

a housing;

The teardown of 8Bitdo SN30 Pro gamepad shows a housing having a main body as upper casing

and lower casing.

 

3

Upper front casing

Lower rear casing

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 4 of 22 PageID #: 39
Claim Language Evidence of Infringement

a first controller moveably

coupled to the housing;

Source:

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

 124090

The 8Bitdo SN30 Pro gamepad has a left analog stick (“first controller”) located on the left side of

the controller, which is used for controlling movement in games.

Source: https://shop.8bitdo.com/products/8bitdo-sn30-pro-bluetooth-gamepad-gray-edition---

nintendo-switch

4

Upper front casing

First joystick

controller

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 5 of 22 PageID #: 40
Claim Language Evidence of Infringement

a concave surface 

positioned on an 

underside of the first 

controller;

Source: https://youtu.be/m-TCVQ61SSs?t=289

The 8Bitdo SN30 Pro gamepad has a concave shape on the bottom side of the left thumb

controller or joystick. The teardown of the controller also reveals this concave underside. The

Convex upper side of the controller means that the underside is concave.

Source: https://shop.8bitdo.com/products/8bitdo-sn30-pro-bluetooth-gamepad-gray-edition---

nintendo-switch

5

Thumb positioned

over first joystick

and can be moved

in any direction

Concave design at

underside of 

joystick

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 6 of 22 PageID #: 41
Claim Language Evidence of Infringement

6

Concave shape

design at

underside of

joystick

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 7 of 22 PageID #: 42
Claim Language Evidence of Infringement

a plurality of impressions 

formed in the concave 

surface with each 

individual impression of 

the plurality of

impressions defining a 

distinct direction the first 

controller may be moved 

linearly or

laterally from a center 

resting position;

Source: 

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

124090

7

Concave shape

design at

underside

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 8 of 22 PageID #: 43
Claim Language Evidence of Infringement

The 8Bitdo SN30 Pro gamepad has a concave surface on its thumbstick that has several

impressions. Each impression represents a specific direction in which the controller can be moved

from its resting position. For example, the thumbstick has four distinct impressions, indicating that

it can move in various directions (such as up-down or left-right).

8

Concave shape

design at

underside of

joystick

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 9 of 22 PageID #: 44
Claim Language Evidence of Infringement

Source: 

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

124090

Source: https://youtu.be/5hj8bij9jA8?t=695

9

Impressions at 

concave underside of 

first joystick

Impressions at concave

underside of first 

joystick

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 10 of 22 PageID #: 45
Claim Language Evidence of Infringement

a potentiometer for

sensing movement of

the first controller and

generating a signal

indicative of a

direction of

movement of the first

controller, the

potentiometer having

a pivotally extending

joystick with a guide

nub affixed to an

upper end of the

joystick that engages

the plurality of

impressions;

 

Source: https://youtu.be/eYuzUwn2rv8?t=49

10

Controller’s

movement in Linear

Direction

Controller’s

movement in Lateral

Direction

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 11 of 22 PageID #: 46
Claim Language Evidence of Infringement

The 8Bitdo SN30 Pro gamepad has a potentiometer attached to the thumb controller that

generates an output voltage signal indicative of the direction of movement. The potentiometer

includes a pivotally extending joystick with a guide nub affixed to its upper end, which engages

the impressions on the concave surface of the joystick.

 

11

First joystick

attached with

potentiometer

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 12 of 22 PageID #: 47
Claim Language Evidence of Infringement

 

Source: 

12

Potentiometer 1 for

measuring the

reading in Y-axis

direction

Potentiometer 2

for measuring the

reading in X-axis

direction

Guiding

Nub

Pivotally

Extending Joystick

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 13 of 22 PageID #: 48
Claim Language Evidence of Infringement

means for biasing the 

concave surface against 

the guide nub; and

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

124090

According to the left joystick movements such as up, down, left and right, the data signal 

generates and can be seen on the screen.

 

13

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 14 of 22 PageID #: 49
Claim Language Evidence of Infringement

Specification Support:

When a dome is 

Subjected to a sliding 

motion, a biasing means 

such as a coil spring, for 

example, may exert a 

force on a means for 

sensing the location or 

movement of the dome.

US Patent No. 8,614,667 

at col. 3, lines 40- 43.

 

Source: https://youtu.be/m-TCVQ61SSs

Based on the general architecture of joysticks, it is common for the joystick to use potentiometers

to detect the position of the joystick. Potentiometers consist of a resistive element and a sliding

contact that moves along the element. However, in order to provide the necessary resistance and

stability to the joystick, a spring is often added to the potentiometer mechanism. Therefore, it is

reasonable to assume that the 8Bitdo SN30 Pro gamepadr's potentiometers contain springs, as

this is a common design feature in joystick potentiometers.

14

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Claim Language Evidence of Infringement

15

Underside

Concave

Surface

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Claim Language Evidence of Infringement

a processing module

configured to

generate the data

signal in response to

receipt of the signal

indicative of a

direction of

movement of the first

controller.

Source: https://www.electroduino.com/dual-axis-joystick-module-how-its-works/

Source: 

16

Joystick of 8BitDo

SN30 Pro Gamepad 

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 17 of 22 PageID #: 52
Claim Language Evidence of Infringement

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

124090

Source:https://www.egr.msu.edu/classes/ece480/capstone/spring13/group05/downloads/

Application%20Note%20-Graham%20Pence.pdf

17

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 18 of 22 PageID #: 53
Claim Language Evidence of Infringement

With the teardown images, is identified that the 8Bitdo SN30 Pro gamepad has a PCB module

which connects with the onboard potentiometers. When the joystick is moved in a certain

direction, the potentiometer produces a voltage signal which is used to interact with a game or

app on a display screen.

18

Case 2:23-cv-00282-JRG-RSP Document 1-2 Filed 06/16/23 Page 19 of 22 PageID #: 54
Claim Language Evidence of Infringement

Source: 

https://www.ifixit.com/Guide/8BitDo+SN30+Pro+Gamepad+Analog+Stick+Cap+Replacement/

124090

According to the left joystick movements such as up, down, left and right, the data signal 

generates and can be seen on the screen.

19

All sensing elements

attached with PCB 

Potentiometer

inside the first

controller

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Claim Language Evidence of Infringement

 

20

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Claim Language Evidence of Infringement

 

Source: https://youtu.be/m-TCVQ61SSs

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