Issued Patents All Time
Showing 51–57 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 5257145 | Optical data recording and reproducing apparatus | Hiroshi Kanazawa, Shinpei Shinozaki, Suguru Takishima | 1993-10-26 |
| 5157459 | Wave front aberration measuring apparatus | Masahiro Oono, Tsuyoshi Itoh, Katsuki Hayashi, Toshiyuki Kase, Masahiko Sasaki +1 more | 1992-10-20 |
| 4956833 | Objective driving device for an optical disk apparatus | Hiroshi Kokado, Suguru Takishima, Koichiro Nishikawa, Junichi Takeda, Masahiko Sasaki +6 more | 1990-09-11 |