Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845700 | Front loading disc player | Toshiaki Koizumi, Masao Kase, Masatsugu Otaki, Kenji Tanaka, Ryo Matsuura | 1989-07-04 |
| 4841518 | Clamping mechanism for information recording disk | Shinsaku Nozu, Masao Kase | 1989-06-20 |