Issued Patents All Time
Showing 51–61 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5434835 | Optical disk apparatus | Hisashi Konno, Takashi Morita, Toshiyuki Kase, Masahiro Oono, Koichi Maruyama +2 more | 1995-07-18 |
| 5416753 | Magneto-optical disk drive system with head position adjustability | Hiroshi Kanazawa, Shimpei Shinozaki, Isao Okuda | 1995-05-16 |
| 5408455 | Control device for head unit having optical head and multiple magnetic heads | — | 1995-04-18 |
| 5337300 | Signal sensing device of magneto-optic disk device for detecting error signal and information record signals with common photo sensor | Toshiyuki Kase | 1994-08-09 |
| 5321678 | Optical head carriage, tracking mechanism and displacement detecting mechanism | Hiroshi Kanazawa, Isao Okuda, Shinpei Shinozaki | 1994-06-14 |
| 5309423 | Magneto-optical reproducing device with optical system having two reflective elements and providing phase difference cancellation | Masato Noguchi, Isao Okuda | 1994-05-03 |
| 5278401 | Optical disc apparatus having five light receiving areas for detecting focus error and tracking error | Isao Okuda, Masahiro Oono, Koichi Maruyama, Masato Noguchi | 1994-01-11 |
| 5257145 | Optical data recording and reproducing apparatus | Hiroshi Kanazawa, Isao Okuda, Shinpei Shinozaki | 1993-10-26 |
| 5103345 | Optical head | Osamu Watanabe | 1992-04-07 |
| 5078471 | Optical head | — | 1992-01-07 |
| 4956833 | Objective driving device for an optical disk apparatus | Hiroshi Kokado, Koichiro Nishikawa, Junichi Takeda, Masahiko Sasaki, Isao Okuda +6 more | 1990-09-11 |