Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7691202 | Ultraviolet light-emitting device in which p-type semiconductor is used | Hideki Hirayama, Yoshinobu Aoyagi | 2010-04-06 |
| 7309394 | Ultraviolet light-emitting device in which p-type semiconductor is used | Hideki Hirayama, Yoshinobu Aoyagi | 2007-12-18 |