Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10303306 | Projection display unit | Takaki Hasuike, Hajime Ishihara, Masaharu Sakata | 2019-05-28 |
| 7920613 | Optical semiconductor device and method of manufacturing same | — | 2011-04-05 |
| 7633986 | Distributed feedback laser diode | Shotaro Kitamura | 2009-12-15 |
| 7083995 | Optical semiconductor device and process for producing the same | — | 2006-08-01 |
| 6828589 | Optical semiconductor device and method for manufacturing the same | — | 2004-12-07 |
| 6707839 | Optical semiconductor device and process for producing the same | — | 2004-03-16 |
| 6399404 | Fabricating method of optical semiconductor device | — | 2002-06-04 |
| 6391671 | Method of producing an optical semiconductor device having a waveguide layer buried in an InP current blocking layer | Yasumasa Inomoto | 2002-05-21 |
| 6383829 | Optical semiconductor device and method of fabricating the same | — | 2002-05-07 |
| 6350629 | Optical semiconductor device having active layer and carrier recombination layer different from each other | — | 2002-02-26 |
| 6222867 | Optical semiconductor device having waveguide layers buried in an InP current blocking layer | Yasumasa Inomoto | 2001-04-24 |
| 6167070 | Optical semiconductor device and method of fabricating the same | — | 2000-12-26 |
| 6134368 | Optical semiconductor device with a current blocking structure and method for making the same | — | 2000-10-17 |
| 6100543 | Electro-absorption type semiconductor optical modulator having a quantum well structure | — | 2000-08-08 |
| 6036771 | Method of manufacturing optical semiconductor device | — | 2000-03-14 |
| 5913107 | Photosemiconductor device and method of fabricating the same | — | 1999-06-15 |
| 5891748 | Semiconductor optical waveguide and method of fabricating the same | — | 1999-04-06 |
| 5847415 | Light emitting device having current blocking structure | — | 1998-12-08 |
| 5790580 | Semiconductor optical integrated device | Takahiro Nakamura, Satoshi Ae | 1998-08-04 |
| 5770466 | Semiconductor optical integrated circuits and method for fabricating the same | Tatsuya Sasaki, Mitsuhiro Kitamura, Kiichi Hamamoto, Shotaro Kitamura, Keiro Komatsu | 1998-06-23 |
| 5756373 | Method for fabricating optical semiconductor device | — | 1998-05-26 |
| 5678935 | Semiconductor optical waveguide and method of fabricating the same | — | 1997-10-21 |
| 5580818 | Fabrication process for semiconductor optical device | — | 1996-12-03 |
| 5565693 | Semiconductor optical integrated circuits | Tatsuya Sasaki, Mitsuhiro Kitamura, Kiichi Hamamoto, Shotaro Kitamura, Keiro Komatsu | 1996-10-15 |
| 5284791 | Method of making tunable semiconductor laser | Masayuki Yamaguchi, Tatsuya Sasaki | 1994-02-08 |