Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7542398 | Aberration correcting element in the optical head of a recording and reproduction system using independent control of phase distribution and defocus pattern variables | — | 2009-06-02 |
| 7483357 | Optical pickup and optical disc apparatus | Kenji Yamamoto, Katsutoshi Sato, Midori Kanaya | 2009-01-27 |
| 7428201 | Optical disc device, optical pickup control method and optical disc discriminating method | Takashi Nakao | 2008-09-23 |
| 7403454 | Optical apparatus and aberration correcting element for correcting aberration by independent control of phase distribution and defocus pattern variables | — | 2008-07-22 |
| 7319644 | Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium | — | 2008-01-15 |
| 7280449 | Optical head and recording and/or reproducing apparatus | Masaru Tezuka | 2007-10-09 |
| 7230903 | Recording and playback apparatus and optical head including a variable optical coupling efficiency device | Hiroaki Mizuma, Motoi Kimura, Kenji Yamamoto, Masatoshi Nishino | 2007-06-12 |
| 7196989 | Optical recording medium driving device | Kenji Yamamoto | 2007-03-27 |
| 7177259 | Optical head and optical recording medium drive device | Masaru Tezuka, Kunika Hashimoto | 2007-02-13 |
| 7173898 | Optical recording medium driving device | Kenji Yamamoto | 2007-02-06 |
| 7095687 | Optical pickup device that corrects the spot shape of reflected light beams | — | 2006-08-22 |
| 6940789 | Optical pickup device that corrects the spot shape of reflected light beams | — | 2005-09-06 |
| 6876622 | Anamorphic prism, optical head and optical recording/reproduction device | — | 2005-04-05 |
| 6781931 | Optical information recording/reproducing apparatus and optical pickup apparatus | — | 2004-08-24 |
| 6778474 | Optical pickup device, optical disc apparatus and method of detecting track discrimination signal | — | 2004-08-17 |
| 6717897 | Optical pickup apparatus, optical disc apparatus, and track recognition signal detection method | — | 2004-04-06 |
| 6700842 | Optical head, photodetector, optical information recording and reproducing apparatus and focus error detecting method | — | 2004-03-02 |
| 6529454 | Integrated optical component, optical pickup, and optical disc device | Yoshito Asoma, Kiyoshi Toyota | 2003-03-04 |
| 5982731 | Optical pickup and opto-magnetic signal reproducing apparatus | Kimihiro Saito, Shuichi Matsumoto, Masato Hattori | 1999-11-09 |
| 5903529 | Optical pickup device and disk player apparatus | Kimihiro Saito, Kazuyoshi Horie, Yasuo Sasaki, Kenji Araki, Kazuhiko Okamatsu | 1999-05-11 |
| 5796701 | Optical pickup and opto-magnetic signal reproducing apparatus | Kimihiro Saito, Shuichi Matsumoto, Masato Hattori | 1998-08-18 |
| 5748368 | Polarization optical element | Hitoshi Tamada, Shuichi Matsumoto, Kimihiro Saito | 1998-05-05 |
| 5732060 | Optical pickup and optical recording medium reproducing apparatus having a wire grid unit | Kiyoshi Toyota, Kimihiro Saito, Hitoshi Tamada, Shuichi Matsumoto | 1998-03-24 |