Issued Patents All Time
Showing 25 most recent of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE40371 | Optical disc recording/reproduction apparatus and method | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe, Akira Suzuki | 2008-06-10 |
| 6721259 | Optical head and recording/reproducing device | Kenji Yamamoto | 2004-04-13 |
| 6674696 | Focus controlling apparatus and method, and optical disc drive | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe | 2004-01-06 |
| 6414931 | Lens driving device, optical head and optical disc system | Fumisada Maeda, Isao Ichimura, Kenji Yamamoto, Toshio Watanabe | 2002-07-02 |
| 6366543 | Optical pickup for discriminating between and reading different types of optical discs | Kamon Uemura, Akio Yamakawa, Masamichi Utsumi | 2002-04-02 |
| 6353592 | Optical recording medium and optical disk device | Toshiyuki Kashiwagi, Tetsuhiro Sakamoto | 2002-03-05 |
| 6292453 | Optical disc recording/reproduction apparatus having a lens group, focus, servo, and jog mode adjustment | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe, Akira Suzuki | 2001-09-18 |
| 6222803 | Optical pickup for discriminating between and reading different types of optical discs | Kamon Uemura, Akio Yamakawa, Masamichi Utsumi | 2001-04-24 |
| 6115347 | Optical pick-up device, optical recording/reproducing apparatus and objective lens | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe, Atsushi Fukumoto +1 more | 2000-09-05 |
| 6104691 | Objective lens unit and recording/reproduction apparatus | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe | 2000-08-15 |
| 6097688 | Recording/reproducing apparatus and recording/reproducing method for optical recording media | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe, Atsushi Fukumoto +1 more | 2000-08-01 |
| 6058095 | Objective lens having a doublet lens with high numerical aperture | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe | 2000-05-02 |
| 6055113 | Optical pickup and an optical pickup objective lense assembling method | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe, Akira Suzuki | 2000-04-25 |
| 6041031 | Optical disc recording/reproduction apparatus and method | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Toshio Watanabe, Akira Suzuki | 2000-03-21 |
| 6005834 | Optical recording medium recording and reproducing apparatus and optical pickup device | Fumisada Maeda, Toshio Watanabe, Isao Ichimura, Atsushi Fukumoto, Kenji Yamamoto | 1999-12-21 |
| 5841513 | Apparatus for reproducing sound signals recorded on a motion picture film with digital sound track | Shunji Yoshimura, Yoshiyuki Akiyama, Isao Ichimura, Toshio Watanabe, Shinji Katsuramoto | 1998-11-24 |
| 5828453 | Lens designing method and objective lens apparatus with two lenses | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe | 1998-10-27 |
| 5786947 | Optical pickup device with a floating element | Fumisada Maeda, Isao Ichimura, Kenji Yamamoto, Toshio Watanabe | 1998-07-28 |
| 5774281 | Optical pickup device for light collection onto an optical recording medium | Fumisada Maeda, Isao Ichimura, Kenji Yamamoto, Toshio Watanabe | 1998-06-30 |
| 5764613 | optical pickup apparatus | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe | 1998-06-09 |
| 5712842 | Optical pick-up device | Kenji Yamamoto, Fumisada Maeda, Isao Ichimura, Toshio Watanabe | 1998-01-27 |
| 5572380 | Disc playback apparatus with automatic disc changer | Yasushi Fujinami | 1996-11-05 |
| 5559766 | Rotary drum tape recording apparatus with controlling optical recording tracks using stored results of scanning of reference tracks | Takashi Nakao, Yoshiteru Kamatani, Tatsuya Narahara, Tadashi Ozue | 1996-09-24 |
| 5515348 | Optical disk pickup device with tilt compensation by electrostriction | — | 1996-05-07 |
| 5513158 | Optical disk pickup device with focusing correction by electrostriction | — | 1996-04-30 |