Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615206 | Optical disk | Takuma Yanagisawa, Hiroki Kuribayashi | 1997-03-25 |
| 5608715 | Multi-layered recording disk and recording/reproducing system using the same | Fumihiko Yokogawa | 1997-03-04 |