Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623462 | Optical information recording/reproducing apparatus | Koichi Tezuka, Satoshi Itami, Tohru Fujimaki | 1997-04-22 |
| 5619482 | Optical head unit for an optical disk using a diffraction grating | Koichi Tezuka, Shingo Hamaguchi | 1997-04-08 |
| 5610895 | Optical head having light blocking means positioned in front of a detector for super-resolution detection | Haruhiko Izumi | 1997-03-11 |
| 5600618 | Optical data recording/reproducing device and integrated head | Koichi Tezuka | 1997-02-04 |