Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4562488 | Device for reproduced sound pitch modification in a tape player | Reikichi Koyama | 1985-12-31 |
| 4380826 | Control system for channel selection | — | 1983-04-19 |
| 4276508 | Electronic attenuator apparatus | — | 1981-06-30 |