Issued Patents 1994
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373437 | Device for and method of reducing cross talk in optical disk device | Tsuyoshi Itoh, Hiroshi Nishikawa, Toshiyuki Kase, Ryota Ogawa, Masahiro Oono +2 more | 1994-12-13 |
| 5321678 | Optical head carriage, tracking mechanism and displacement detecting mechanism | Suguru Takishima, Hiroshi Kanazawa, Shinpei Shinozaki | 1994-06-14 |
| 5317144 | Wave front aberration measuring apparatus having means for adjusting position of collimator lens | Masahiro Oono, Tsuyoshi Itoh, Katsuki Hayashi, Toshiyuki Kase, Masahiko Sasaki +1 more | 1994-05-31 |
| 5309423 | Magneto-optical reproducing device with optical system having two reflective elements and providing phase difference cancellation | Masato Noguchi, Suguru Takishima | 1994-05-03 |
| 5297114 | Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength | Tsuyoshi Itoh, Toshiyuki Kase, Hiroshi Nishikawa, Ryoto Ogawa, Masahiro Oono +3 more | 1994-03-22 |
| 5280464 | Optical disk apparatus having a focusing error correcting system | Tsuyoshi Itoh, Toshiyuki Kase, Hiroshi Nishikawa, Ryota Ogawa, Masahiro Oono +2 more | 1994-01-18 |
| 5278401 | Optical disc apparatus having five light receiving areas for detecting focus error and tracking error | Suguru Takishima, Masahiro Oono, Koichi Maruyama, Masato Noguchi | 1994-01-11 |