Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680384 | Laser emission unit, optical head and optical memory device | Hideya Seki, Toshio Arimura, Takashi Takeda | 1997-10-21 |
| 5673241 | Focus detection mechanism and optical head and optical storage device that use it | Fumio Koyama, Takashi Takeda, Toshio Arimura, Hidefumi Sakata, Osamu Yokoyama | 1997-09-30 |
| 5602383 | Optical apparatus for optically reading and recording information | Taro Takekoshi | 1997-02-11 |