Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4361621 | Magnetic recording medium | Yukihiro Isobe, Akihiko Hosaka, Hideo Kobayashi | 1982-11-30 |
| 4357391 | Magnetic recording medium | Akihiko Hosaka | 1982-11-02 |
| 4336310 | Magnetic recording medium and preparation thereof | Akihiko Hosaka, Yukihiro Isobe | 1982-06-22 |
| 4323628 | Magnetic recording medium | Akihiko Hosaka | 1982-04-06 |