Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866546 | Recording and reproducing apparatus for disk-type recording media | Shozo Nakagawa, Shunichi Ohnishi | 1989-09-12 |
| 4858218 | Optical recording medium and reproducing apparatus | Kiyoshi Kimoto | 1989-08-15 |
| 4802021 | Recording and/or reproducing apparatus using opto-magnetic disc | Shozo Makagawa, Shunichi Onishi | 1989-01-31 |