Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5991243 | Data playback device to control a laser illuminating position by comparing phase of a laser drive signal and a laser tracking error detection signal | Yuwa Ishi | 1999-11-23 |
| 5825736 | Optical disk apparatus | Isao Kimura, Shinichi Tanaka | 1998-10-20 |