Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855981 | Method and device for reading out optically recorded data and compensating for a drastic change in the position of a line to be read | Fumio Kimura, Yukio Hamasaki | 1989-08-08 |
| 4817067 | Optical recording medium | Masaaki Nishioka | 1989-03-28 |