Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9960572 | Semiconductor device | Hirotatsu Ishii, Norihiro Iwai, Takeyoshi Matsuda, Akihiko Kasukawa, Takuya Ishikawa +2 more | 2018-05-01 |
| 9911842 | Nitride semiconductor device, production method thereof, diode, and field effect transistor | Kazuyuki UMENO, Shinya Otomo, Keishi Takaki, Jiang Li, Takuya Kokawa +3 more | 2018-03-06 |
| 9269577 | Method for manufacturing nitride semiconductor device | — | 2016-02-23 |
| 9099383 | Semiconductor substrate and semiconductor device, and manufacturing method of semiconductor substrate | Takuya Kokawa | 2015-08-04 |
| 9048302 | Field effect transistor having semiconductor operating layer formed with an inclined side wall | Yoshihiro Sato, Hiroshi Kambayashi, Yuki Niiyama, Takehiko Nomura, Seikoh Yoshida +1 more | 2015-06-02 |
| 8884393 | Nitride compound semiconductor device and manufacturing method thereof | Takuya Kokawa, Tatsuyuki Shinagawa, Kazuyuki UMENO, Sadahiro Kato | 2014-11-11 |
| 8860038 | Nitride semiconductor device and manufacturing method for the same | Takuya Kokawa | 2014-10-14 |
| 8569800 | Field effect transistor | Nariaki Ikeda, Takuya Kokawa, Sadahiro Kato | 2013-10-29 |
| 8552531 | Nitride-based compound semiconductor and nitride-based compound semiconductor device | — | 2013-10-08 |
| 8450782 | Field effect transistor, method of manufacturing field effect transistor, and method of forming groove | Yoshihiro Sato, Takehiko Nomura, Nariaki Ikeda, Takuya Kokawa, Sadahiro Kato | 2013-05-28 |
| 8338859 | Semiconductor electronic device having reduced threading dislocation and method of manufacturing the same | Takuya Kokawa, Sadahiro Kato, Yoshihiro Sato | 2012-12-25 |
| 8304809 | GaN-based semiconductor device and method of manufacturing the same | Shusuke Kaya, Seikoh Yoshida, Sadahiro Kato, Takehiko Nomura, Nariaki Ikeda +3 more | 2012-11-06 |
| 8072002 | Field effect transistor | Yuki Niyama, Seikoh Yoshida, Hiroshi Kambayashi, Takehiko Nomura, Shinya Ootomo | 2011-12-06 |
| 8067787 | Semiconductor electronic device | Takuya Kokawa, Sadahiro Kato, Yoshihiro Sato | 2011-11-29 |
| 7812371 | GaN based semiconductor element | Shusuke Kaya, Seikoh Yoshida, Sadahiro Kato, Takehiko Nomura, Nariaki Ikeda +3 more | 2010-10-12 |
| 7679104 | Vertical type semiconductor device and manufacturing method of the device | Yoshihiro Sato, Sadahiro Kato, Hitoshi Sasaki, Shinya Ootomo, Yuki Niiyama | 2010-03-16 |
| 6898224 | Semiconductor laser device | Mikihiro Yokozeki, Kaname Saito, Hirotatsu Ishii | 2005-05-24 |