Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253122 | Automatic adjustment of biasing current for recording sound by three-head type tape-recorder | — | 1981-02-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253122 | Automatic adjustment of biasing current for recording sound by three-head type tape-recorder | — | 1981-02-24 |