Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6407968 | Optical information recording/reproducing apparatus having focus error signal compensation | Hiroshi Fuji, Nobuo Ogata | 2002-06-18 |
| 6392970 | Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium | Hiroshi Fuji, Shigemi Maeda, Tomoyuki Miyake, Nobuo Ogata, Jun Akiyama +3 more | 2002-05-21 |
| 6388977 | Hologram laser unit and optical pickup device including the same | Keiji Sakai | 2002-05-14 |