Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |