Issued Patents All Time
Showing 51–63 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 6618343 | Optical information processor and optical element | Youichi Saitoh, Junichi Asada, Yuichi Takahashi, Seiji Nishiwaki, Kazuo Momoo +1 more | 2003-09-09 |
| 6496453 | Optical pickup | Junichi Asada, Hiroshi Kayama, Youichi Saitoh, Seiji Nishiwaki | 2002-12-17 |
| 6304526 | Optical head | Yasuhiro Tanaka, Tetsuo Saimi, Yoichi Saito, Yasuo Nishihara | 2001-10-16 |
| 6229772 | Optical disc device and optical disc discriminating method | Eiji Kumagai, Futoshi Tsukada | 2001-05-08 |
| 6021102 | Disc drive apparatus for more than one type of disc | Hidekazu Seto | 2000-02-01 |
| 6014361 | Beam expander to change an elliptical light beam emitted from a laser source to a circular light beam | Akihiro Sakaguchi, Hiroshi Gotou, Youichi Saitou | 2000-01-11 |
| 5309460 | Semiconductor laser with encapsulated lead members | Yoshitsugu Fujimaki, Morito Yokoyama, Kunio Tsuboi, Toshihiro Imai, Atsushi Ogasawara | 1994-05-03 |
| 5144614 | Optical pickup device | Hidehiro Kume, Etsufumi Yamamoto | 1992-09-01 |
| 4412377 | Method for manufacturing a hybrid integrated circuit device | Hiroshi Matsumoto, Masataka Tanaka, Hirosi Oodaira, Nobuo Iwase | 1983-11-01 |