Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833663 | Information recording/reproducing apparatus for handling defective sectors on an optical disk | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki | 1989-05-23 |
| 4823333 | Optical disk duplicating apparatus using sector data identification information for controlling duplication | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuzuru Kuroki | 1989-04-18 |
| 4821254 | Information recording and reproducing apparatus which detects deterioration of a medium in each sector before recording | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuzuru Kuroki | 1989-04-11 |