Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5930227 | Optical disk having an evaluation pattern for evaluating the optical disk | Hiroharu Satoh | 1999-07-27 |
| 5892751 | Optical disk having an evaluation pattern for evaluating the optical disk | Hiroharu Satoh | 1999-04-06 |
| 5696756 | Optical disk having an evaluation pattern for evaluating the optical disk | Hiroharu Satoh | 1997-12-09 |
| 5475210 | Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device | Toyoki Taguchi, Toshihiro Sugaya, Hisashi Yamada, Kei Shimura, Isao Hoshino +4 more | 1995-12-12 |