Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4452864 | Magnetic recording medium | Yoshimi Kitahara, Fumio Maruta | 1984-06-05 |
| 4393110 | Magnetic recording medium | — | 1983-07-12 |
| 4268882 | Magnetic erasing head | — | 1981-05-19 |