Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10462564 | Operating a headset that includes microphone line and pushbutton keys | Ball Fan, Christopher Michael Graves | 2019-10-29 |
| 9479882 | Initial command to switch transistors disconnecting keys from microphone line | Ball Fan, Christopher Michael Graves | 2016-10-25 |