Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5748600 | Rotational optical head for optical recording medium | Susumu Nomura, Naoharu Yanagawa, Hiroshi Suzuki | 1998-05-05 |
| 4663267 | Process of producing information recording disc | Fumio Matsui | 1987-05-05 |
| 4582776 | Information recording disc having light absorbing cellulose nitrate coating | Fumio Matsui | 1986-04-15 |