Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10985533 | Semiconductor laser device, semiconductor laser module, and laser light source system for welding | Tougo Nakatani, Takahiro OKAGUCHI, Norio Ikedo, Takeshi Yokoyama, Tomohito Yabushita +1 more | 2021-04-20 |
| 7139235 | Optical element with diffraction grating, semiconductor device, and optical information recording device employing the same | Naoki Nakanishi, Shinichi Ijima, Hideyuki Nakanishi | 2006-11-21 |
| 7064898 | Optoelectronic device | Shin'ichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa | 2006-06-20 |
| 7035196 | Optical head device and optical recording and reproducing apparatus having lasers aligned in a tangential direction | Yukio Saitoh, Naoki Nakanishi, Hideyuki Nakanishi | 2006-04-25 |
| 6947213 | Diffractive optical element that polarizes light and an optical pickup using the same | Hideyuki Nakanishi, Shinichi Ijima, Akio Yoshikawa, Teruhiro Shiono | 2005-09-20 |
| 6747939 | Semiconductor laser device and optical pickup device using the same | Yukio Saitoh, Naoki Nakanishi, Hideyuki Nakanishi | 2004-06-08 |
| 6735024 | Optical pickup with improved optical properties | Hideyuki Nakanishi, Shinichi Ijima, Akio Yoshikawa, Kazutoshi Onozawa, Kazuhiko Yamanaka +1 more | 2004-05-11 |
| 6728035 | Optical device with diffraction grating having plural grating regions | Shinichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa, Naoki Nakanishi | 2004-04-27 |
| 6728034 | Diffractive optical element that polarizes light and an optical pickup using the same | Hideyuki Nakanishi, Shinichi Ijima, Akio Yoshikawa, Teruhiro Shiono | 2004-04-27 |
| 6597642 | Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same | Shinichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa | 2003-07-22 |
| 6501601 | Optical device with diffraction grating having plural grating regions | Shinichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa, Naoki Nakanishi | 2002-12-31 |
| 6473248 | Method for manufacturing an optical pickup | Hideyuki Nakanishi, Shinichi Ijima, Akio Yoshikawa, Kazutoshi Onozawa, Kazuhiko Yamanaka +1 more | 2002-10-29 |