Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6879552 | Information recording and reproducing system enabling a selection of whether or not to perform an interruption and resumption of a data-recording | — | 2005-04-12 |
| 6529465 | Optical system for optical disk drive | Hiroshi Nishikawa, Wataru Kubo, Ryoichi Nakanishi, Amit Jain | 2003-03-04 |
| 6411588 | Optical data recording/reproducing device | Hiroshi Nishikawa | 2002-06-25 |
| 6018393 | Evaluating system for a dual focus lens | Suguru Takishima | 2000-01-25 |
| 5917599 | Lens inclination adjustment system using an interferometer | Hiroshi Nishikawa | 1999-06-29 |
| 5896362 | Lens Inclination Adjustment System | Isao Okuda, Hiroshi Nishikawa | 1999-04-20 |
| 5894370 | Inclination monitoring system | Isao Okuda, Hiroshi Nishikawa | 1999-04-13 |
| 5883709 | Inclination monitoring system including reflection of collimated light | Isao Okuda, Hiroshi Nishikawa | 1999-03-16 |
| 5805363 | Collimating lens unit | Isao Okuda, Hiroshi Nishikawa | 1998-09-08 |
| 5790501 | Information reproducing device | Hiroshi Nishikawa | 1998-08-04 |
| 5751491 | Method of adjusting beam axis of optical pick-up | Hiroshi Nishikawa | 1998-05-12 |
| 5740147 | Phase compensation of optical elements by tilting a half wave plate in a magneto-optic disk head | Hiroshi Nishikawa | 1998-04-14 |
| 5663939 | Optical data recording and reproducing apparatus including non-circular beam spot | — | 1997-09-02 |
| 5553052 | Inclination of an objective lens in an optical information system | Masahiro Oono, Hisashi Konno, Katsuki Hayashi, Hiroshi Nishikawa | 1996-09-03 |
| 5434835 | Optical disk apparatus | Hisashi Konno, Suguru Takishima, Takashi Morita, Masahiro Oono, Koichi Maruyama +2 more | 1995-07-18 |
| 5430375 | Position detecting apparatus using magneto-resistance effect element | Norikatsu Inoue, Kazutaka Noborimoto, Kunio Nakazato | 1995-07-04 |
| 5373437 | Device for and method of reducing cross talk in optical disk device | Tsuyoshi Itoh, Isao Okuda, Hiroshi Nishikawa, Ryota Ogawa, Masahiro Oono +2 more | 1994-12-13 |
| 5337300 | Signal sensing device of magneto-optic disk device for detecting error signal and information record signals with common photo sensor | Suguru Takishima | 1994-08-09 |
| 5317144 | Wave front aberration measuring apparatus having means for adjusting position of collimator lens | Masahiro Oono, Tsuyoshi Itoh, Katsuki Hayashi, Masahiko Sasaki, Hiroshi Yamamoto +1 more | 1994-05-31 |
| 5297114 | Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength | Tsuyoshi Itoh, Isao Okuda, Hiroshi Nishikawa, Ryoto Ogawa, Masahiro Oono +3 more | 1994-03-22 |
| 5280464 | Optical disk apparatus having a focusing error correcting system | Tsuyoshi Itoh, Isao Okuda, Hiroshi Nishikawa, Ryota Ogawa, Masahiro Oono +2 more | 1994-01-18 |
| 5157459 | Wave front aberration measuring apparatus | Masahiro Oono, Tsuyoshi Itoh, Katsuki Hayashi, Masahiko Sasaki, Hiroshi Yamamoto +1 more | 1992-10-20 |