Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5497364 | Optical recording/reproducing apparatus in which data will not become unable to be read out in case an SDL fails to be renewed | Hitoshi Ichikawa, Masanobu Nakamura | 1996-03-05 |
| 5351227 | Optical recording/reproducing apparatus in which data will not become unable to be read out in case an SDL fails to be renewed | Hitoshi Ichikawa, Masanobu Nakamura | 1994-09-27 |