Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525825 | Method and apparatus for detecting focussing and tracking error signals | Kenichi Ito, Tohru Musha, Kimiaki Yamamoto | 1985-06-25 |
| 4520280 | Apparatus for detecting input signal | Shozi Yoshikawa, Hiroshi Kodama, Ken Ohsima, Masaharu Sakamoto, Kunio Yamamiya | 1985-05-28 |
| 4509830 | Light beam separation method | Tohru Musha, Kenichi Ito | 1985-04-09 |
| 4507763 | Optical information recording and/or reproducing apparatus and optical record medium for use in such apparatus | — | 1985-03-26 |
| 4505584 | Method and apparatus for detecting focussing error signal of objective lens | Tohru Musha, Kenichi Ito | 1985-03-19 |
| 4505585 | System for detecting defects on an optical surface | Shoji Yoshikawa, Ken Ohshima, Hiroshi Kodama, Kunio Yamamiya, Masaharu Sakamoto | 1985-03-19 |
| 4499572 | Method for reading information or defect out of rotating disc | Shozi Yoshikawa, Masaharu Sakamoto, Hiroshi Kodama, Kunio Yamamiya, Ken Ohsima | 1985-02-12 |
| 4499514 | Disc drive apparatus | Kunio Yamamiya, Hiroshi Kodama, Ken Ohshima, Shoji Yoshikawa, Masaharu Sakamoto | 1985-02-12 |
| 4495407 | System for focusing an optical head onto a flat surface | Hiroshi Kodama, Masaharu Sakamoto, Ken Ohshima, Shoji Yoshikawa, Kunio Yamamiya | 1985-01-22 |
| 4472748 | Method of processing information signal with respect to opto-magnetic record medium | Tsuneo Yanagida | 1984-09-18 |
| 4464050 | Apparatus for detecting optically defects | Masaharu Sakamoto, Shoji Yoshikawa, Kunio Yamamiya, Hiroshi Kodama, Ken Ohsima | 1984-08-07 |
| 4455085 | Method and apparatus for detecting a focussing condition of an objective lens | Kenichi Ito, Tohru Musha | 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 | Tohru Musha, Kenichi Ito | 1984-06-05 |
| 4451863 | Information reproducing apparatus based on opto-magnetic effect | Tuneo Yanagida | 1984-05-29 |
| 4425636 | Method and apparatus for reproducing optically an information recorded on a record medium along tracks | Tohru Musha, Kenichi Ito | 1984-01-10 |
| 4423495 | Method and apparatus for recording optically an information signal on a record medium along tracks | Tohru Musha, Kenichi Ito | 1983-12-27 |
| 4422168 | Method and apparatus for detecting a focussing condition of an objective lens | Kenichi Ito, Tohru Musha | 1983-12-20 |