Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7675076 | Nitride-based semiconductor device of reduced voltage drop | Koji Otsuka, Junji Sato, Yoshiki Tada, Takashi Yoshida | 2010-03-09 |
| 7671375 | Nitride-based semiconductor device of reduced voltage drop, and method of fabrication | Koji Otsuka, Junji Sato, Yoshiki Tada, Takashi Yoshida | 2010-03-02 |
| 7569870 | Gallium-nitride-based compound semiconductor device | Masataka Yanagihara, Masahiro Sato | 2009-08-04 |
| 7449727 | Overvoltage-protected light-emitting semiconductor device | Junji Sato, Mikio Tazima, Arei Niwa, Yasuhiro Kamii | 2008-11-11 |
| 7446342 | Light emitting diode having conductive reflecting layer | Mikio Tazima, Junji Sato, Yasuhiro Kamii, Arei Niwa | 2008-11-04 |
| 7400000 | Nitride-based semiconductor device | Koji Otsuka, Junji Sato, Yoshiki Tada, Takashi Yoshida | 2008-07-15 |
| 7202510 | Semiconductor luminescent device and manufacturing method thereof | Yoshiki Tada, Arei Niwa, Yasuhiro Kamii, Junji Sato, Takasi Kato | 2007-04-10 |
| 7176480 | Light-emitting semiconductor device having a quantum well active layer, and method of fabrication | Koji Ohtsuka, Junji Sato, Yoshitaka Tanaka, Mikio Tajima | 2007-02-13 |
| 7173311 | Light-emitting semiconductor device with a built-in overvoltage protector | Junji Sato, Koji Otsuka, Takashi Kato, Arei Niwa, Yasuhiro Kamii | 2007-02-06 |
| 6979844 | Light-emitting semiconductor device and method of fabrication | Kohji Ohtsuka, Masataka Yanagihara, Masaaki Kikuchi | 2005-12-27 |
| 6890791 | Compound semiconductor substrates and method of fabrication | Koji Ohtsuka, Junji Sato, Masahiro Sato | 2005-05-10 |
| 5814838 | Light emitting semiconductor element with ZN doping | Koji Ohtsuka, Hitoshi Murofushi, Emiko Chino | 1998-09-29 |