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 | Yasuo Nakata, Nobuo Ogata | 2002-06-18 |
| 6404717 | Optical reproducing device and optical memory medium | Tetsuya Okumura, Shigemi Maeda | 2002-06-11 |
| 6392970 | Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium | Shigemi Maeda, Tomoyuki Miyake, Yasuo Nakata, Nobuo Ogata, Jun Akiyama +3 more | 2002-05-21 |