Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868821 | Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5 | Masashi Ito, Toshiki Matsuno, Hiroshi Yasuda | 1989-09-19 |
| 4846968 | Resolving agent | Yoichi Yuki, Ichiro Okamoto, Tohru Shibata | 1989-07-11 |
| 4842392 | Objective lens driving unit | Masashi Ito, Toshiki Itoi, Akifumi Hashimoto | 1989-06-27 |
| 4818394 | Separating agent | Yoshio Okamoto, Koichi Hatada, Tohru Shibata, Ichiro Okamoto | 1989-04-04 |