Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11374546 | Automatic volume control for land mobile radio | Christian K. Barker, Joshua Alan Johnson, Marshall Pommier Schiring | 2022-06-28 |
| 10469047 | Automatic volume control for land mobile radio | Christian K. Barker, Joshua Alan Johnson, Marshall Pommier Schiring | 2019-11-05 |
| 9923534 | Automatic volume control for land mobile radio | Christian K. Barker, Joshua Alan Johnson, Marshall Pommier Schiring | 2018-03-20 |