Issued Patents All Time
Showing 101–106 of 106 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847480 | Focus error detecting apparatus | Susumu Nomura | 1989-07-11 |
| 4805992 | Astigmatism generator | — | 1989-02-21 |
| 4731527 | An astigmatic focusing system with optical elements oriented to produce astigmatism in a predetermined direction to maximize detector sensitivity | Susumu Nomura | 1988-03-15 |
| 4695158 | Focus error detector | Fumitaka Kotaka | 1987-09-22 |
| 4691098 | Focus control device | — | 1987-09-01 |
| 4660191 | Tracking signal error generator for optical information devices | Kenjiro Hamanaka | 1987-04-21 |