Issued Patents All Time
Showing 51–75 of 81 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6665257 | Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same | Kousei Sano, Hiroaki Yamamoto, Ken'ichi Kasazumi, Seiji Nishino | 2003-12-16 |
| 6661769 | Optical storage medium, a tilt detection apparatus, and a data recording and reproducing apparatus | Kousei Sano, Hiromichi Ishibashi, Shigeru Furumiya | 2003-12-09 |
| 6654336 | Semiconductor light source, optical pickup head apparatus, and data record/playback apparatus | Yoshiaki Komma | 2003-11-25 |
| 6643245 | Optical element, light source apparatus, optical head apparatus, and optical information processing apparatus | Hiroaki Yamamoto, Hideki Hayashi | 2003-11-04 |
| 6643303 | Laser drive device, optical head, and optical information processor | Tatsuo Ito, Tomotada Kamei, Hiroaki Yamamoto, Yoshiaki Komma | 2003-11-04 |
| 6532202 | Optical element, optical head and optical recording reproducing apparatus | Hidenori Wada, Hiroaki Yamamoto, Tetsuo Saimi, Daisuke Ogata, Naoya Hotta +1 more | 2003-03-11 |
| 6480042 | Current-to-voltage converting circuit, optical pickup head apparatus, and apparatus and method for recording/reproducing data | — | 2002-11-12 |
| 6418095 | Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same | Kousei Sano, Hiroaki Yamamoto, Ken'ichi Kasazumi, Seiji Nishino | 2002-07-09 |
| 6418107 | Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same | Kousei Sano, Hiroaki Yamamoto, Ken'ichi Kasazumi, Seiji Nishino | 2002-07-09 |
| 6363039 | Disk tilting compensation with an offset signal to control the location of a light beam | Hideki Hayashi, Yasuo Fujikawa, Ryusuke Horibe | 2002-03-26 |
| 6327231 | Optical head device with zero-cross point correction | Kousei Sano, Hiroaki Yamamoto, Ken'ichi Kasazumi, Seiji Nishino | 2001-12-04 |
| 6327110 | Optical system, position detecting apparatus, magnetic recording apparatus, and lens with aperture | Kousei Sano | 2001-12-04 |
| 6314068 | Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same | Kousei Sano, Hiroaki Yamamoto, Ken'ichi Kasazumi, Seiji Nishino | 2001-11-06 |
| 6185168 | Super-resolution optical head apparatus | Makoto Kato, Kenichi Kasazumi, Hiroaki Yamamoto, Kazuhisa Yamamoto | 2001-02-06 |
| 6181491 | Optical head device, information recording and reproducing apparatus and optical system | Kousei Sano | 2001-01-30 |
| 6172959 | Optical information processing apparatus | Kousei Sano, Shin-ichi Tanaka | 2001-01-09 |
| 6154426 | Optical pick-up head unit and information record and playback equipment using the optical pick-up head unit | — | 2000-11-28 |
| 6115345 | Super-resolution optical head apparatus | Makoto Kato, Kenichi Kasazumi, Hiroaki Yamamoto, Kazuhisa Yamamoto | 2000-09-05 |
| 6111842 | Optical head | Seiji Nishino, Hiroaki Yamamoto, Ken'ichi Kasazumi | 2000-08-29 |
| 6091690 | Optical head device and optical information processing apparatus | Kousei Sano | 2000-07-18 |
| 6009054 | Information recording medium and tracking error signal detection apparatus and magnetic recording apparatus and method of adjusting the magnetic recording apparatus | Shinichi Tanaka, Seiji Nishiwaki, Kousei Sano, Seiji Nishino | 1999-12-28 |
| 5892741 | Information recording medium and tracking error signal detection apparatus and magnetic recording apparatus and method of adjusting the magnetic recording apparatus | Shinichi Tanaka, Seiji Nishiwaki, Kousei Sano, Seiji Nishino | 1999-04-06 |
| 5881039 | Signal processing device for an optical information reproducing apparatus | Kousei Sano | 1999-03-09 |
| 5740141 | Signal processing device for an optical information reproducing apparatus | Kousei Sano | 1998-04-14 |
| 5687153 | Optical head device and optical information apparatus using a lithium niobate hologram with divisional areas to diffract light to corresponding photo detector areas | Yoshiaki Komma, Seiji Nishino, Hiroaki Yamamoto, Makoto Kato, Tetsuo Saimi | 1997-11-11 |