Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6822989 | Semiconductor laser and a manufacturing method for the same | Toshiya Fukuhisa, Masaya Manno | 2004-11-23 |
| 6735024 | Optical pickup with improved optical properties | Hideyuki Nakanishi, Shoichi Takasuka, Shinichi Ijima, Kazutoshi Onozawa, Kazuhiko Yamanaka +1 more | 2004-05-11 |
| 6728034 | Diffractive optical element that polarizes light and an optical pickup using the same | Hideyuki Nakanishi, Shoichi Takasuka, Shinichi Ijima, Teruhiro Shiono | 2004-04-27 |
| 6728035 | Optical device with diffraction grating having plural grating regions | Shoichi Takasuka, Shinichi Ijima, Hideyuki Nakanishi, Naoki Nakanishi | 2004-04-27 |