Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648197 | Optical disk | — | 1997-07-15 |
| 5631056 | Optical recording medium | Toshinori Kawanishi | 1997-05-20 |
| 5576084 | Optical recording medium and the producing method of the optical recording medium | — | 1996-11-19 |
| 5270150 | Optical recording medium and process for producing it | Kenji Oishi, Toshinori Kawanishi, Koji TSUJITA | 1993-12-14 |