Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12327983 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2025-06-10 |
| 12009636 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2024-06-11 |
| 11605935 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2023-03-14 |
| 11581706 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2023-02-14 |
| 10938183 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA, Masaki Funabashi +1 more | 2021-03-02 |
| 10511150 | Wavelength-variable laser | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA, Masaki Funabashi +1 more | 2019-12-17 |
| 10020638 | Optical semiconductor device, semiconductor laser module, and optical fiber amplifier | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2018-07-10 |
| 9711945 | Method of designing semiconductor laser device, method of designing raman amplifier, methods of manufacturing semiconductor laser device, semiconductor laser device, raman amplifier, and optical communication system | Hideaki Hasegawa, Noriyuki Yokouchi, Taketsugu SAWAMURA, Junji Yoshida | 2017-07-18 |
| 9601905 | Optical semiconductor device, semiconductor laser module, and optical fiber amplifier | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2017-03-21 |
| 9083150 | Optical semiconductor device, semiconductor laser module, and optical fiber amplifier | Junji Yoshida, Hirokazu Itoh, Yuichiro Irie, Taketsugu SAWAMURA | 2015-07-14 |
| 8385379 | Optical semiconductor device and pumping light source for optical fiber amplifier | Junji Yoshida, Naoki Tsukiji, Hidehiro Taniguchi, Hirokazu Itoh, Harunobu Ikeda +2 more | 2013-02-26 |
| 7006545 | Semiconductor laser device and optical fiber amplifier using the same | Junji Yoshida, Naoki Tsukiji, Tsuyoshi Saito, Ryuichiro Minato | 2006-02-28 |
| 6925102 | Semiconductor laser device, semiconductor laser module, and Raman amplifier using the device or module | Junji Yoshida, Naoki Tsukiji | 2005-08-02 |
| 6921677 | Method of manufacturing semiconductor element, and semiconductor element manufactured with this method | Naoki Tsukiji | 2005-07-26 |
| 6898228 | Semiconductor laser device, semiconductor laser module, Raman amplifier using the device or module, and method for forming a suitable current blocking layer | Naoki Tsukiji, Junji Yoshida | 2005-05-24 |
| 6746964 | Method of manufacturing semiconductor laser element | Naoki Tsukiji | 2004-06-08 |