Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6747939 | Semiconductor laser device and optical pickup device using the same | Yukio Saitoh, Shoichi Takasuka, Hideyuki Nakanishi | 2004-06-08 |
| 6735024 | Optical pickup with improved optical properties | Hideyuki Nakanishi, Shoichi Takasuka, Shinichi Ijima, Akio Yoshikawa, Kazutoshi Onozawa +1 more | 2004-05-11 |
| 6728035 | Optical device with diffraction grating having plural grating regions | Shoichi Takasuka, Shinichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa | 2004-04-27 |