Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12206050 | Semiconductor optical device having distributed feed-back type laser and electroabsorption-type modulator | Yuki Ito | 2025-01-21 |
| 11966104 | Optical modulator | Makoto Ogasawara, Naoya KONO | 2024-04-23 |
| 8987117 | Semiconductor optical integrated device and method for fabricating the same | Shigekazu Okumura, Shuichi Tomabechi, Ayahito Uetake | 2015-03-24 |
| 8565279 | Semiconductor optical integrated device and method for fabricating the same | Shigekazu Okumura, Shuichi Tomabechi, Ayahito Uetake | 2013-10-22 |
| 7924896 | Optical semiconductor device | Tsuyoshi Yamamoto, Manabu Matsuda, Kan Takada, Shigekazu Okumura | 2011-04-12 |
| 7804870 | Semiconductor optical device and manufacturing method thereof | Kan Takada, Tsuyoshi Yamamoto, Tatsuya Takeuchi | 2010-09-28 |
| 7482617 | Optical semiconductor device and fabrication method thereof | Tsuyoshi Yamamoto | 2009-01-27 |
| 6853661 | Gain-coupled semiconductor laser device lowering blue shift | — | 2005-02-08 |
| 6376338 | Manufacturing method of a semiconductor device having a diffraction grating | Takuya Fujii, Yuji Kotaki, Manabu Matsuda | 2002-04-23 |
| 6238943 | Optical semiconductor device and a method of manufacturing the same | Hirohiko Kobayashi, Nirou Okazaki, Shouichi Ogita, Haruhisa Soda, Haruhiko Tabuchi +1 more | 2001-05-29 |
| 6034983 | Method of fabricating compound semiconductor device and optical semiconductor device | Takuya Fujii, Tsuyoshi Yamamoto, Hirohiko Kobayashi | 2000-03-07 |
| 5987046 | Optical semiconductor device and a method of manufacturing the same | Hirohiko Kobayashi, Nirou Okazaki, Shouichi Ogita, Haruhisa Soda, Haruhiko Tabuchi +1 more | 1999-11-16 |
| 5937273 | Fabricating compound semiconductor by varying ratio of stagnant layer thickness and mean free path of seed material | Takuya Fujii, Tsuyoshi Yamamoto, Hirohiko Kobayashi | 1999-08-10 |