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, Kazuo Momoo | 2004-11-23 |
| 6819642 | Data recording device, data reproducing device, and optical disc | Satoshi Kumai, Tetsuji Kawashima, Eiji Kumagai, Toshio Morizumi | 2004-11-16 |
| 6819647 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kazuo Momoo +1 more | 2004-11-16 |
| 6757227 | Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical disc | Eiji Kumagai, Toshio Morizumi | 2004-06-29 |
| 6674709 | Optical head apparatus | Junichi Asada, Seiji Nishiwaki, Yuichi Takahashi, Hiroaki Matsumiya, Youichi Saitoh +1 more | 2004-01-06 |