Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812638 | Focusing error detector and optical data detecting device incorporating the focusing error detector | Nobuo Ogata, Yasuo Nakata, Hideaki Satou, Toshiyuki Tanaka, Etsuji Minami +2 more | 1989-03-14 |