Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888756 | Optical information recording and reproducing apparatus | Satoshi Shikichi | 1989-12-19 |
| 4853920 | Information recording medium and reproducing method therefor | Akio Aoki, Masahiko Enari | 1989-08-01 |
| 4821251 | Method and apparatus for recording or reproducing information in or from only a sector of an optical disk track without any defect by shifting a light beam to an adjacent track before a defective sector | — | 1989-04-11 |
| 4811316 | Apparatus for seeking a track of an optical information carrier in which a loss of detection signal is compensated for | — | 1989-03-07 |
| 4811321 | Information recording medium | Masahiko Enari, Akio Aoki | 1989-03-07 |