Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7880187 | Semiconductor light emitting device having narrow radiation spectrum | Keizo Kawaguchi, Hanako Ono | 2011-02-01 |
| 7084422 | Semiconductor light emitting device having quantum well layer sandwiched between carrier confinement layers | Tsuyoshi Maruyama, Kazuhisa Ishii, Shotaro Tomita, Keizo Kawaguchi, Toshio Tomiyoshi | 2006-08-01 |
| 6900467 | Semiconductor light emitting device having quantum well layer sandwiched between carrier confinement layers | Tsuyoshi Maruyama, Kazuhisa Ishii, Shotaro Tomita, Keizo Kawaguchi, Toshio Tomiyoshi | 2005-05-31 |
| 6593602 | Edge emission type semiconductor device for emitting super luminescent light, its manufacture and spatial optical communication device | Ji-Hao Liang, Yoshihiro Ogawa, Tsuyoshi Maruyama | 2003-07-15 |