Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5945689 | Light-emitting semiconductor device using group III nitride compound | Masayoshi Koike | 1999-08-31 |
| 5753939 | Light-emitting semiconductor device using a Group III nitride compound and having a contact layer upon which an electrode is formed | Michinari Sassa, Naoki Shibata, Masayoshi Koike, Junichi Umezaki, Takahiro Kozawa | 1998-05-19 |
| 5650641 | Semiconductor device having group III nitride compound and enabling control of emission color, and flat display comprising such device | Michinari Sassa, Masayoshi Koike, Katsuhide Manabe, Norikatsu Koide, Hisaki Kato +2 more | 1997-07-22 |
| 5587593 | Light-emitting semiconductor device using group III nitrogen compound | Norikatsu Koide, Shiro Yamazaki, Junichi Umezaki | 1996-12-24 |