Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336310 | Magnetic recording medium and preparation thereof | Kiyotaka Okuyama, Yukihiro Isobe | 1982-06-22 |
| 4332863 | Magnetic recording medium | — | 1982-06-01 |
| 4329398 | Magnetic recording medium | Kazushi Tanaka | 1982-05-11 |
| 4323628 | Magnetic recording medium | Kiyotaka Okuyama | 1982-04-06 |
| 4307154 | Magnetic recording medium | Kazushi Tanaka | 1981-12-22 |
| 4238548 | Magnetic recording medium | Kiyotaka Okuyama | 1980-12-09 |