Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875074 | Image recording apparatus | Kazuo Sangyoji, Jun Sakai, Shigeyuki Hayashi, Makoto Suzuki | 1989-10-17 |
| 4841508 | Method and apparatus for detecting a track and focus errors in an optical head | — | 1989-06-20 |