Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657930 | Tracking control circuit for tracking a wobbling track formed on an optical recording medium | — | 2003-12-02 |
| 6618346 | Optical pickup device having aperture restriction arrangement | Takanori Maeda | 2003-09-09 |
| 6590857 | Optical disk | Akinori Ohkubo, Takuma Yanagisawa | 2003-07-08 |