Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10916232 | Acoustical optical pickup for use in stringed musical instruments | David M. Kramer, David Earl Ball | 2021-02-09 |
| 9024172 | Acostical optical pickup for use in a stringed musical instrument | — | 2015-05-05 |