Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Osao Miyazawa | 1994-09-27 |