Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801499 | Optical recording medium | Akira Aoyama, Mamoru Sugimoto | 1989-01-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801499 | Optical recording medium | Akira Aoyama, Mamoru Sugimoto | 1989-01-31 |