Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648947 | Optical disk device having track jumping control | Eiji Yabuki | 1997-07-15 |
| 5619482 | Optical head unit for an optical disk using a diffraction grating | Koichi Tezuka, Kyoko Miyabe | 1997-04-08 |