Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6618424 | Optical pickup device | Yoichi Tsuchiya | 2003-09-09 |
| 6574182 | Optical pickup compatible with a plurality of types of optical disks having different thicknesses | Seiji Kajiyama, Yasuyuki Kanou, Yoichi Tsuchiya | 2003-06-03 |
| 6552990 | Optical head for two different disk thicknesses with a light beam diameter control device | Seiji Kajiyama, Yoichi Tsuchiya, Yasuyuki Kanou, Shuichi Ichiura | 2003-04-22 |