Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858219 | Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit | — | 1989-08-15 |
| 4748605 | Bias-magnetic-field generating apparatus in magneto-optical information writing and erasing system | Mitsugu Sakai | 1988-05-31 |
| 4745609 | Stabilized laser device | — | 1988-05-17 |
| 4745588 | Tracking control apparatus | Masanori Doi | 1988-05-17 |
| 4745610 | Semiconductor laser drive device with an abnormal voltage protection circuit | — | 1988-05-17 |
| 4734914 | Stabilized laser apparatus | — | 1988-03-29 |
| 4728188 | Light source degeradation detecting apparatus for laser device | Seizi Kitagawa, Haruhiko Takemura | 1988-03-01 |
| 4718068 | Stabilized laser device of optical information recording/reproduction apparatus | — | 1988-01-05 |
| 4713819 | Semiconductor laser driver | — | 1987-12-15 |
| 4520280 | Apparatus for detecting input signal | Hiroshi Kodama, Ken Ohsima, Masaharu Sakamoto, Kiichi Kato, Kunio Yamamiya | 1985-05-28 |
| 4499572 | Method for reading information or defect out of rotating disc | Masaharu Sakamoto, Hiroshi Kodama, Kunio Yamamiya, Kiichi Kato, Ken Ohsima | 1985-02-12 |