Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082728 | Magnetic disc | Akira Miyake, Norio Akai | 1992-01-21 |
| 4709816 | Recording disc cartridge | Fujio Matsumoto, Hajime Doi, Kunio Mizushima, Masaya Funahashi, Shoichi Sakamoto | 1987-12-01 |