Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6169714 | Apparatus and method for recording/reproducing magneto-optical information | Yasuhito Tanaka, Masaaki Kurebayashi, Takeshi Maeda, Hitoshi Watanabe, Tetsu Watanabe +3 more | 2001-01-02 |
| 5598389 | Signal detector for an optical information reproducing apparatus | Junichi Nakano, Hiroshi Ezawa | 1997-01-28 |
| 5515353 | Optical head with forward and return light beam propagating along a common path | Yasuhiro Miyazaki | 1996-05-07 |
| 5404490 | Photomagnetic signal detecting device | Yoichi Hosaka, Ken Sugawara | 1995-04-04 |
| 5249171 | Opto-magnetic pick-up device including phase difference correcting means | Tsuneo Yanagida, Kiichi Kato | 1993-09-28 |
| 5132953 | Multi-beam optical recording/reproducing apparatus for recording/reproducing on a medium having a recording flat part with a guide groove on each side | — | 1992-07-21 |
| 5124868 | Magneto-optic player with improved C/N ratio | Osamu Nakano | 1992-06-23 |
| 5099470 | Apparatus for reproducing information from opto-magnetic record medium | — | 1992-03-24 |
| 4721850 | Optical pickup device having a detector for detecting the light emitting intensity variation of a semiconductor light emitting element | Mitsugu Sakai | 1988-01-26 |
| 4682311 | Photomagnetic differential reproducing system | Kiichi Kato | 1987-07-21 |
| D288558 | Optical pickup for use in optical discs | Haruhiko Takemura, Tsuneo Yanagida, Masaharu Sakamoto | 1987-03-03 |
| 4631712 | Optical disk apparatus with beam energy correction for deviations in inclination | Hideyuki Kenjyo, Kiichi Kato, Masaharu Sakamoto | 1986-12-23 |
| 4607359 | Optical recording/reproducing apparatus | Kiichi Kato, Masaharu Sakamoto | 1986-08-19 |