Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 6704254 | Optical disk device, control method of optical system, medium, and information aggregate | Seiji Nishiwaki, Junji Nagaoka | 2004-03-09 |
| 6674709 | Optical head apparatus | Junichi Asada, Seiji Nishiwaki, Yuichi Takahashi, Kenji Nagashima, Hiroaki Matsumiya +1 more | 2004-01-06 |