Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7560725 | Method for fabricating group III nitride compound semiconductors and group III nitride compound semiconductor devices | Masayoshi Koike, Toshio Hiramatsu | 2009-07-14 |
| 7491984 | Method for fabricating group III nitride compound semiconductors and group III nitride compound semiconductor devices | Masayoshi Koike, Toshio Hiramatsu, Seiji Nagai | 2009-02-17 |
| 7462867 | Group III nitride compound semiconductor devices and method for fabricating the same | — | 2008-12-09 |
| 7141444 | Production method of III nitride compound semiconductor and III nitride compound semiconductor element | Masayoshi Koike, Hiroshi Yamashita, Seiji Nagai, Toshio Hiramatsu | 2006-11-28 |
| 7052979 | Production method for semiconductor crystal and semiconductor luminous element | Seiji Nagai, Kazuyoshi Tomita, Shiro Yamazaki, Toshio Hiramatsu | 2006-05-30 |
| 6979584 | Method for producing group III nitride compound semiconductor and group III nitride compound semiconductor device | Masayoshi Koike, Toshio Hiramatsu | 2005-12-27 |
| 6967122 | Group III nitride compound semiconductor and method for manufacturing the same | — | 2005-11-22 |
| 6861305 | Methods for fabricating group III nitride compound semiconductors and group III nitride compound semiconductor devices | Masayoshi Koike, Toshio Hiramatsu, Seiji Nagai | 2005-03-01 |
| 6855620 | Method for fabricating Group III nitride compound semiconductor substrates and semiconductor devices | Masayoshi Koike, Seiji Nagai | 2005-02-15 |
| 6830948 | Method for producing group III nitride compound semiconductor and group III nitride compound semiconductor device | Masayoshi Koike, Akira Kojima, Toshio Hiramatsu | 2004-12-14 |
| 6680957 | Group III nitride compound semiconductor laser | Masayoshi Koike, Shiro Yamasaki, Seiji Nagai, Akira Kojima, Toshio Hiramatsu | 2004-01-20 |
| 6631149 | Laser diode using group III nitride group compound semiconductor | Masayoshi Koike | 2003-10-07 |
| 6518599 | Light-emitting device using group III nitride group compound semiconductor | Tamiyo Umezaki, Toshio Hiramatsu, Masayoshi Koike | 2003-02-11 |
| 5933443 | Semiconductor laser | Masato Mushiage, Minoru Murayama | 1999-08-03 |
| 5661581 | Optical communication unit | Masato Mushiage, Naotaro Nakata, Kenji Okada | 1997-08-26 |