Issued Patents All Time
Showing 26–50 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7986607 | Wave plate, optical pickup and optical disc apparatus | Jun-ichi Asada | 2011-07-26 |
| 7948839 | Optical disk apparatus | Hiroshi Kayama | 2011-05-24 |
| 7929399 | Optical pickup device and optical disc device | Hiroaki Matsumiya | 2011-04-19 |
| 7911926 | Optical disc drive | Seiji Nishiwaki | 2011-03-22 |
| 7830761 | Optical disk apparatus | Hiroshi Kayama, Hiroaki Matsumiya | 2010-11-09 |
| 7796491 | Wavelength plate, optical element, and optical pickup | Jun-ichi Asada, Seiji Nishiwaki | 2010-09-14 |
| 7692875 | Optical pickup and optical disk device having this pickup | Seiji Nishiwaki | 2010-04-06 |
| 7660222 | Optical disk apparatus and information recording/reproduction method | Hiroshi Kayama | 2010-02-09 |
| 7525896 | Optical head and optical disk apparatus | Yuuichi Takahashi | 2009-04-28 |
| 7505389 | Information processing device and information recording medium | Seiji Nishiwaki | 2009-03-17 |
| 7468939 | Optical disk apparatus with phase difference offset | Hiroaki Matsumiya, Seiji Nishiwaki | 2008-12-23 |
| 7463569 | Optical disk apparatus with a wavelength plate having a two-dimensional array of birefringent regions | Seiji Nishiwaki, Jun-ichi Asada, Kenji Otani, Yusuke Kanda | 2008-12-09 |
| 7330418 | Optical disk with plural signal mark positions in a direction substantially perpendicular to tracks | Seiji Nishiwaki, Junji Nagaoka | 2008-02-12 |
| 7230888 | Light emitting device and information processing apparatus | Yuuichi Takahashi | 2007-06-12 |
| 7196991 | Optical disk apparatus, method for calculation of amount of lens shift, program and medium | Junji Nagaoka, Seiji Nishiwaki | 2007-03-27 |
| 7142489 | Optical disk device with photodetector | Seiji Nishiwaki, Youichi Saitoh | 2006-11-28 |
| 7126904 | Optical disk device | Seiji Nishiwaki, Yuichi Takahashi, Kei Ikeda | 2006-10-24 |
| 6930972 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kenji Nagashima +1 more | 2005-08-16 |
| 6920101 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kenji Nagashima +1 more | 2005-07-19 |
| 6914870 | Optical head apparatus | Junichi Asada, Seiji Nishiwaki, Yuichi Takahashi, Kenji Nagashima, Hiroaki Matsumiya +1 more | 2005-07-05 |
| 6909685 | Optical disk device having light converging means which marks plural signal mark positions in a direction substantially perpendicular to tracks | Seiji Nishiwaki, Junji Nagaoka | 2005-06-21 |
| 6888787 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kenji Nagashima +1 more | 2005-05-03 |
| 6822934 | Optical disc apparatus for finding a tracking error for an optical disk | Seiji Nishiwaki, Yoichi Saito, Kenji Nagashima | 2004-11-23 |
| 6819647 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kenji Nagashima +1 more | 2004-11-16 |
| 6741538 | Optical device for recording and reproducing information | Yuichi Takahashi, Hiroaki Matsumiya | 2004-05-25 |