Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5029319 | Cleaning sheet for a magnetic disc | — | 1991-07-02 |
| 4985799 | Disk cartridge with improved disk cleaning | — | 1991-01-15 |
| 4897752 | Disk cartridge | Toru Yamakawa, Fujio Matsumoto, Kunio Mizushima | 1990-01-30 |
| 4803584 | Disk cartridge with cleaning sheet of non-woven fabric | Norio Akai, Fujio Matsumoto | 1989-02-07 |
| 4709816 | Recording disc cartridge | Fujio Matsumoto, Kunio Mizushima, Masaya Funahashi, Tomizo Taniguchi, Shoichi Sakamoto | 1987-12-01 |