Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5270995 | Method for recording and reproducing information by varying a work function of a recording medium and device for the same | Katsuo Wada, Kenji Ohta | 1993-12-14 |
| 5008873 | Tilt adjustment mechanism for object lens driving device | Toshiyuki Tanaka | 1991-04-16 |
| 4812638 | Focusing error detector and optical data detecting device incorporating the focusing error detector | Nobuo Ogata, Yasuo Nakata, Hideaki Satou, Toshiyuki Tanaka, Yoshio Yoshida +2 more | 1989-03-14 |