Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6617061 | Group III nitride compound semiconductor device and group III nitride compound semiconductor light-emitting device | Shiro Yamasaki | 2003-09-09 |
| 6552376 | Group III nitride compound semiconductor device | Shiro Yamasaki | 2003-04-22 |
| 6541798 | Group III nitride compound semiconductor device and group III nitride compound semiconductor light-emitting device | Shiro Yamasaki | 2003-04-01 |
| 6541293 | Semiconductor light-emitting device and manufacturing method thereof | Norikatsu Koide, Shinya Asami, Junichi Umezaki, Shiro Yamasaki, Seiji Nagai | 2003-04-01 |
| 6518599 | Light-emitting device using group III nitride group compound semiconductor | Tamiyo Umezaki, Yuta Tezen, Toshio Hiramatsu | 2003-02-11 |
| 6486068 | Method for manufacturing group III nitride compound semiconductor laser diodes | Shiro Yamasaki, Seiji Nagai, Isamu Akasaki, Hiroshi Amano, Isao Yamada +1 more | 2002-11-26 |
| 6471770 | Method of manufacturing semiconductor substrate | Seiji Nagai | 2002-10-29 |
| 6420733 | Semiconductor light-emitting device and manufacturing method thereof | Norikatsu Koide, Shinya Asami, Junichi Umezaki, Shiro Yamasaki, Seiji Nagai | 2002-07-16 |
| 6326236 | Semiconductor light-emitting device and manufacturing method thereof | Norikatsu Koide, Shinya Asami, Junichi Umezaki, Shiro Yamasaki, Seiji Nagai | 2001-12-04 |
| 6288416 | Light-emitting semiconductor device using group III nitride compound | Shinya Asami | 2001-09-11 |
| 6265726 | Light-emitting aluminum gallium indium nitride compound semiconductor device having an improved luminous intensity | Katsuhide Manabe, Hisaki Kato, Michinari Sassa, Shiro Yamazaki, Makoto Asai +1 more | 2001-07-24 |
| 6188087 | Semiconductor light-emitting device | Norikatsu Koide, Shiro Yamasaki, Isamu Akasaki, Hiroshi Amano | 2001-02-13 |
| 6040588 | Semiconductor light-emitting device | Norikatsu Koide, Shinya Asami, Junichi Umezaki, Shiro Yamasaki, Seiji Nagai | 2000-03-21 |
| 6005258 | Light-emitting semiconductor device using group III Nitrogen compound having emission layer doped with donor and acceptor impurities | Katsuhide Manabe, Hisaki Kato, Michinari Sassa, Shiro Yamazaki, Makoto Asai +1 more | 1999-12-21 |
| 5959401 | Light-emitting semiconductor device using group III nitride compound | Shinya Asami | 1999-09-28 |
| 5953581 | Methods for manufacturing group III nitride compound semiconductor laser diodes | Shiro Yamasaki, Seiji Nagai | 1999-09-14 |
| 5945689 | Light-emitting semiconductor device using group III nitride compound | Shinya Asami | 1999-08-31 |
| 5889806 | Group III nitride compound semiconductor laser diodes | Seiji Nagai, Shiro Yamasaki, Kazuyoshi Tomita, Tetsu Kachi, Isamu Akasaki +1 more | 1999-03-30 |
| 5862167 | Light-emitting semiconductor device using gallium nitride compound | Michinari Sassa, Norikatsu Koide, Shiro Yamazaki, Junichi Umezaki, Naoki Shibata +2 more | 1999-01-19 |
| 5811319 | Methods of forming electrodes on gallium nitride group compound semiconductors | Seiji Nagai, Shiro Yamasaki, Masanori Murakami, Katsuyuki Tsukui, Hidenori Ishikawa | 1998-09-22 |
| 5760460 | Light-emitting diode array | Masayuki Kuwabara | 1998-06-02 |
| 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, Shinya Asami, Junichi Umezaki, Takahiro Kozawa | 1998-05-19 |
| 5700713 | Light emitting semiconductor device using group III nitride compound and method of producing the same | Shiro Yamazaki, Naoki Shibata | 1997-12-23 |
| 5652438 | Light-emitting semiconductor device using group III nitride compound | Michinari Sassa, Makoto Tamaki, Naoki Shibata, Masami Yamada, Takahide Oshio | 1997-07-29 |
| 5650641 | Semiconductor device having group III nitride compound and enabling control of emission color, and flat display comprising such device | Michinari Sassa, Katsuhide Manabe, Norikatsu Koide, Hisaki Kato, Naoki Shibata +2 more | 1997-07-22 |