Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829205 | Optical pickup, tilt detection apparatus, tilt detection method and optical disk apparatus | — | 2004-12-07 |
| 6781930 | Diffraction grating, optical pick-up, error signal detection device, and error signal detection method | — | 2004-08-24 |
| 6775221 | Optical pickup and recording and/or reproducing apparatus | — | 2004-08-10 |