Issued Patents All Time
Showing 126–150 of 155 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6849472 | Nitride semiconductor device with reduced polarization fields | Michael R. Krames, Tetsuya Takeuchi, Norihide Yamada, Isamu Akasaki | 2005-02-01 |
| 6829273 | Nitride semiconductor layer structure and a nitride semiconductor laser incorporating a portion of same | Isamu Akasaki, Yawara Kaneko, Norihide Yamada, Tetsuya Takeuchi, Satoshi Watanabe | 2004-12-07 |
| 6690700 | Nitride semiconductor device | Tetsuya Takeuchi, Yawara Kaneko, Norihide Yamada, Isamu Akasaki | 2004-02-10 |
| 6569704 | Group III-V semiconductor light emitting devices with reduced piezoelectric fields and increased efficiency | Tetsuya Takeuchi, Norihide Yamada, Isamu Akasaki | 2003-05-27 |
| 6537513 | Semiconductor substrate and method for making the same | Tetsuya Takeuchi, Isamu Akasaki | 2003-03-25 |
| 6534791 | Epitaxial aluminium-gallium nitride semiconductor substrate | Nobuaki Hayashi, Tetsuya Takeuchi, Isamu Akasaki | 2003-03-18 |
| 6486068 | Method for manufacturing group III nitride compound semiconductor laser diodes | Shiro Yamasaki, Seiji Nagai, Masayoshi Koike, Isamu Akasaki, Isao Yamada +1 more | 2002-11-26 |
| 6446001 | Navigation apparatus for navigating a vehicle based on symbolic sounds | Hideki Sakai, Takashi Takinami, Miyuki Matsumoto | 2002-09-03 |
| 6439552 | Overhead wire tensioning device | Satoshi Ageishi, Yoshio Narumiya, Toru Uchikoshi, Shoji Konta, Yoshinori Wakabayashi +2 more | 2002-08-27 |
| 6229151 | Group III-V semiconductor light emitting devices with reduced piezoelectric fields and increased efficiency | Tetsuya Takeuchi, Norihide Yamada, Isamu Akasaki | 2001-05-08 |
| 6188087 | Semiconductor light-emitting device | Norikatsu Koide, Masayoshi Koike, Shiro Yamasaki, Isamu Akasaki | 2001-02-13 |
| 5905276 | Light emitting semiconductor device using nitrogen-Group III compound | Katsuhide Manabe, Masahiro Kotaki, Hisaki Kato, Michinari Sassa, Isamu Akasaki | 1999-05-18 |
| 5889806 | Group III nitride compound semiconductor laser diodes | Seiji Nagai, Shiro Yamasaki, Masayoshi Koike, Kazuyoshi Tomita, Tetsu Kachi +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 |
| 5846844 | Method for producing group III nitride compound semiconductor substrates using ZnO release layers | Isamu Akasaki, Kazumasa Hiramatsu, Theeradetch Detchprohm | 1998-12-08 |
| 5834326 | Process for producing a luminous element of group III nitride semi-conductor | Mamoru Miyachi, Toshiyuki Tanaka, Yoshinori Kimura, Hirokazu Takahashi, Hitoshi Sato +3 more | 1998-11-10 |
| 5825789 | Process for producing a resonator in a semiconductor laser device | Yoshiaki Watanabe, Satoshi Miyaguchi, Isamu Akasaki | 1998-10-20 |
| 5620557 | Sapphireless group III nitride semiconductor and method for making same | Katsuhide Manabe, Masayoshi Koike, Hisaki Kato, Norikatsu Koide, Isamu Akasaki | 1997-04-15 |
| 5604763 | Group III nitride compound semiconductor laser diode and method for producing same | Hisaki Kato, Norikatsu Koide, Masayoshi Koike, Isamu Akasaki | 1997-02-18 |
| 5583879 | Gallum nitride group compound semiconductor laser diode | Shiro Yamazaki, Norikatsu Koide, Katsuhide Manabe, Isamu Akasaki | 1996-12-10 |
| 5496766 | Method for producing a luminous element of III-group nitride | Isamu Akasaki, Toshiyuki Tanaka, Teruo Tohma, Katsuhide Manabe | 1996-03-05 |
| 5389571 | Method of fabricating a gallium nitride based semiconductor device with an aluminum and nitrogen containing intermediate layer | Tetsuya Takeuchi, Isamu Akasaki, Atsushi Watanabe, Katsuhide Manabe | 1995-02-14 |
| 5370738 | Compound semiconductor vapor phase epitaxial device | Atsushi Watanabe, Kazumasa Hiramatsu, Isamu Akasaki | 1994-12-06 |
| 5281830 | Light-emitting semiconductor device using gallium nitride group compound | Masahiro Kotaki, Isamu Akasaki | 1994-01-25 |
| 5247533 | Gallium nitride group compound semiconductor laser diode | Nobuo Okazaki, Katsuhide Manabe, Isamu Akasaki | 1993-09-21 |