Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4361621 | Magnetic recording medium | Kiyotaka Okuyama, Akihiko Hosaka, Hideo Kobayashi | 1982-11-30 |
| 4336310 | Magnetic recording medium and preparation thereof | Kiyotaka Okuyama, Akihiko Hosaka | 1982-06-22 |