Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4405953 | Magnetic recording and reproducing device | Akira Inomata, Tsunao Hasegawa | 1983-09-20 |
| 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 |
| 4297730 | Magnetic recording and reproducing device | Hidetaka Kadowaki, Akira Inomata, Kiyoshi Yanagida, Tsunao Hasegawa, Satoshi Ishii | 1981-10-27 |