Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7745850 | Nitride-based semiconductor device with reduced leakage current | Koji Otsuka, Masataka Yanagihara | 2010-06-29 |
| 5814838 | Light emitting semiconductor element with ZN doping | Koji Ohtsuka, Hitoshi Murofushi, Tetsuji Moku | 1998-09-29 |