Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801499 | Optical recording medium | Shigeru Kogure, Mamoru Sugimoto | 1989-01-31 |
| 4800112 | Optical recording medium | Nobuhiko Kano, Shinobu Kunida | 1989-01-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801499 | Optical recording medium | Shigeru Kogure, Mamoru Sugimoto | 1989-01-31 |
| 4800112 | Optical recording medium | Nobuhiko Kano, Shinobu Kunida | 1989-01-24 |