Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650992 | Phase change optical disc | — | 1997-07-22 |
| 5631895 | Optical information recording medium | Mitsuya Okada, Tatsunori Ide | 1997-05-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650992 | Phase change optical disc | — | 1997-07-22 |
| 5631895 | Optical information recording medium | Mitsuya Okada, Tatsunori Ide | 1997-05-20 |