Issued Patents All Time
Showing 76–86 of 86 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7884351 | Nitride semiconductor light-emitting device | Katsushi Akita, Yusuke Yoshizumi | 2011-02-08 |
| 7858963 | Nitride based semiconductor optical device, epitaxial wafer for nitride based semiconductor optical device, and method of fabricating semiconductor light-emitting device | Masaki Ueno, Yohei Enya, Katsushi Akita, Yusuke Yoshizumi, Takamichi Sumitomo +1 more | 2010-12-28 |
| 7851243 | Nitride based semiconductor optical device, epitaxial wafer for nitride based semiconductor optical device, and method of fabricating semiconductor light-emitting device | Masaki Ueno, Yohei Enya, Katsushi Akita, Yusuke Yoshizumi, Takamichi Sumitomo +1 more | 2010-12-14 |
| 7851821 | Group III nitride semiconductor device, epitaxial substrate, and method of fabricating group III nitride semiconductor device | Yusuke Yoshizumi, Yohei Enya, Katsushi Akita, Masaki Ueno, Takamichi Sumitomo +1 more | 2010-12-14 |
| 7816238 | GaN substrate, substrate with epitaxial layer, semiconductor device, and method of manufacturing GaN substrate | Hideki Osada, Hitoshi Kasai, Keiji Ishibashi, Seiji Nakahata, Katsushi Akita +1 more | 2010-10-19 |
| 7781314 | Nitride semiconductor device manufacturing method | Masaki Ueno | 2010-08-24 |
| 7576351 | Nitride semiconductor light generating device | Hideki Hirayama | 2009-08-18 |
| 7554122 | Nitride semiconductor light emitting device, and method of fabricating nitride semiconductor light emitting device | Hideki Hirayama | 2009-06-30 |
| 7547910 | Semiconductor light-emitting device and method of manufacturing semiconductor light-emitting device | Katsushi Akita, Yusuke Yoshizumi, Hiroyuki Kitabayashi, Koji Katayama | 2009-06-16 |
| 7387678 | GaN substrate and method of fabricating the same, nitride semiconductor device and method of fabricating the same | Katsushi Akita, Eiryo Takasuka, Masahiro Nakayama, Masaki Ueno, Kouhei Miura | 2008-06-17 |
| 6998284 | Semiconductor device having quantum well structure, and method of forming the same | Masaki Ueno, Katsushi Akita | 2006-02-14 |