Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673241 | Focus detection mechanism and optical head and optical storage device that use it | Fumio Koyama, Masatoshi Yonekubo, Takashi Takeda, Toshio Arimura, Hidefumi Sakata | 1997-09-30 |
| 5623509 | Semiconductor laser and light-sensing device using the same | Hideaki Iwano, Hiroaki Nomura | 1997-04-22 |