Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6340824 | Semiconductor light emitting device including a fluorescent material | Satoshi Komoto, Koichi Nitta, Nobuhiro Suzuki, Kuniaki Konno, Chisato Furukawa | 2002-01-22 |
| 6320207 | Light emitting device having flat growth GaN layer | Chisato Furukawa, Masayuki Ishikawa, Kenji Isomoto | 2001-11-20 |
| 6232137 | Semiconductor light emitting element and its manufacturing method | Masayuki Ishikawa | 2001-05-15 |
| 6221684 | GaN based optoelectronic device and method for manufacturing the same | Masayuki Ishikawa | 2001-04-24 |
| 6204084 | Nitride system semiconductor device and method for manufacturing the same | Lisa Sugiura, Mariko Suzuki, Kazuhiko Itaya, Hidetoshi Fujimoto, Johji Nishio +1 more | 2001-03-20 |
| 6191439 | Semiconductor light emitting device | — | 2001-02-20 |
| 6030848 | Method for manufacturing a GaN-based compound semiconductor light emitting device | Shozo Yuge | 2000-02-29 |
| 6020602 | GaN based optoelectronic device and method for manufacturing the same | Masayuki Ishikawa | 2000-02-01 |
| 6017807 | P-type GaN compound semiconductor and method for manufacturing the same | Chisato Furukawa, Masayuki Ishikawa, Kenji Isomoto | 2000-01-25 |
| 5981977 | Nitride compound semiconductor light emitting element and its manufacturing method | Chisato Furukawa, Masayuki Ishikawa, Nobuhiro Suzuki | 1999-11-09 |
| 5932896 | Nitride system semiconductor device with oxygen | Lisa Sugiura, Mariko Suzuki, Kazuhiko Itaya, Hidetoshi Fujimoto, Johji Nishio +1 more | 1999-08-03 |
| 5930656 | Method of fabricating a compound semiconductor device | Chisato Furukawa, Masayuki Ishikawa, Kenji Isomoto | 1999-07-27 |
| 5780873 | Semiconductor device capable of easily forming cavity and its manufacturing method | Kazuhiko Itaya, Masahiro Yamamoto, Masaaki Onomura, Hidetoshi Fujimoto, Genichi Hatakoshi +3 more | 1998-07-14 |
| 5696389 | Light-emitting semiconductor device | Masayuki Ishikawa, Yukie Nishikawa, Masaaki Onomura, Shinji Saito, Peter James Parbrook +5 more | 1997-12-09 |
| 5693963 | Compound semiconductor device with nitride | Hidetoshi Fujimoto, Koichi Nitta, Masayuki Ishikawa, Yoshihiro Kokubun, Masahiro Yamamoto | 1997-12-02 |
| 5466950 | Semiconductor light emitting device with short wavelength light selecting means | Kazuhiko Itaya | 1995-11-14 |
| 5459746 | Surface emission type semiconductor light-emitting device | Kazuhiko Itaya | 1995-10-17 |
| 5410159 | Light-emitting diode | Kazuhiko Itaya | 1995-04-25 |
| 5321712 | Semiconductor light-emitting device having a cladding layer composed of an InGaAlp-based compound | Kazuhiko Itaya, Koichi Nitta, Genichi Hatakoshi, Yukie Nishikawa, Mariko Suzuki | 1994-06-14 |
| 5202895 | Semiconductor device having an active layer made of InGaAlP material | Koichi Nitta, Masayuki Ishikawa, Yukie Nishikawa, Minoru Watanabe, Masaki Okajima +1 more | 1993-04-13 |
| 5153889 | Semiconductor light emitting device | Masayuki Ishikawa, Yoshihiro Kokubun, Yukie Nishikawa, Shigeya Naritsuka, Kazuhiko Itaya +2 more | 1992-10-06 |
| 5048035 | Semiconductor light emitting device | Masayuki Ishikawa, Yoshihiro Kokubun, Yukie Nishikawa, Shigeya Naritsuka | 1991-09-10 |
| 5034957 | Semiconductor laser device | Yasuo Ohba, Yukie Nishikawa, Hajime OKUDA, Masayuki Ishikawa, Hideo Shiozawa +1 more | 1991-07-23 |
| 4949349 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Niyoko Watanabe, Masayuki Ishikawa, Yukio Watanabe, Motoyuki Yamamoto | 1990-08-14 |
| 4910743 | Semiconductor laser with mesa stripe waveguide structure | Yasuo Ohba, Masayuki Ishikawa, Motoyuki Yamamoto, Yukio Watanabe | 1990-03-20 |