Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4600650 | Magnetic recording medium | Akihiko Hosaka, Kiyotaka Okuyama | 1986-07-15 |
| 4460651 | Magnetic recording medium | Akihiko Hosaka, Kiyotaka Okuyama | 1984-07-17 |
| 4459319 | Process for producing a magnetic recording medium | Akihiko Hosaka, Kiyotaka Okuyama | 1984-07-10 |