Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6661828 | Semiconductor laser device | Ryosuke Yatsu, Akihiko Kasukawa | 2003-12-09 |
| 6643315 | Distributed feedback semiconductor laser device and multi-wavelength laser array | Akihiko Kasukawa, Norihiro Iwai | 2003-11-04 |
| 6614823 | Semiconductor laser device having a diffraction grating on a light reflection side | Naoki Tsukiji, Junji Yoshida | 2003-09-02 |
| 6580740 | Semiconductor laser device having selective absorption qualities | Ryosuke Yatsu, Akihiko Kasukawa | 2003-06-17 |
| 6493369 | Gain-coupling distributed feedback type semiconductor laser device | Akihiko Kasukawa | 2002-12-10 |
| 6472691 | Distributed feedback semiconductor laser device | Toshikazu Mukaihara, Hitoshi Shimizu, Akihiko Kasukawa | 2002-10-29 |