Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4715024 | Optical head with provision for tracking and focussing control | — | 1987-12-22 |
| 4644516 | Optical head | — | 1987-02-17 |
| 4525825 | Method and apparatus for detecting focussing and tracking error signals | Kenichi Ito, Kiichi Kato, Kimiaki Yamamoto | 1985-06-25 |
| 4509830 | Light beam separation method | Kiichi Kato, Kenichi Ito | 1985-04-09 |
| 4507764 | Objective lens drive device with tracking error correction with flux of opposite direction | — | 1985-03-26 |
| 4505584 | Method and apparatus for detecting focussing error signal of objective lens | Kiichi Kato, Kenichi Ito | 1985-03-19 |
| 4455085 | Method and apparatus for detecting a focussing condition of an objective lens | Kiichi Kato, Kenichi Ito | 1984-06-19 |
| 4453239 | Method and apparatus for controlling the focusing and tracking of a light beam using a main and secondary light beam in association with multiple detectors | Kiichi Kato, Kenichi Ito | 1984-06-05 |
| 4425636 | Method and apparatus for reproducing optically an information recorded on a record medium along tracks | Kiichi Kato, Kenichi Ito | 1984-01-10 |
| 4423495 | Method and apparatus for recording optically an information signal on a record medium along tracks | Kiichi Kato, Kenichi Ito | 1983-12-27 |
| 4422168 | Method and apparatus for detecting a focussing condition of an objective lens | Kenichi Ito, Kiichi Kato | 1983-12-20 |