Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689496 | Optical recording medium having spiral tracks formed with a turning angle of more than 360.degree. | — | 1997-11-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689496 | Optical recording medium having spiral tracks formed with a turning angle of more than 360.degree. | — | 1997-11-18 |