Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837757 | Optical recording/reproducing device | Yoshiaki Ikeda, Ken Ohsima | 1989-06-06 |
| 4819220 | Optical information recording and reproducing apparatus | Tasuhiro Miyazaki, Toshio Tsurukawa, Shohei Kobayashi | 1989-04-04 |