Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839760 | Read/write apparatus for disk cartridge | Tomohiko Abe, Osamu Miyazawa | 1989-06-13 |
| 4839883 | Optical information recording medium | Kenichi Nagata | 1989-06-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839760 | Read/write apparatus for disk cartridge | Tomohiko Abe, Osamu Miyazawa | 1989-06-13 |
| 4839883 | Optical information recording medium | Kenichi Nagata | 1989-06-13 |