Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352130 | Magnetic sound recorder having computer-controlled adjusting device | Tsunao Hasegawa | 1982-09-28 |
| 4344094 | Method and apparatus detecting and setting optimum tape recording bias | Tsunao Hasegawa | 1982-08-10 |