Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11018477 | Tunable laser for coherent transmission system | — | 2021-05-25 |
| 10481333 | Athermal silicon photonics wavelength locker and meter | — | 2019-11-19 |
| 7911686 | Optical module and optical communication system | Shigeru Nakagawa | 2011-03-22 |
| 7711019 | Variable wavelength light source | — | 2010-05-04 |
| 6973238 | Optical switch and optical communication system | Shigeru Nakagawa | 2005-12-06 |
| 6924918 | Optical modulator and method of manufacturing the same | Fumio Otake | 2005-08-02 |
| 6906308 | Semiconductor light receiving device in which optical and electric signal are propagated at matched velocities | Nami Yasuoka | 2005-06-14 |
| 6872966 | Optical semiconductor device | Suguru Akiyama, Shigeaki Sekiguchi | 2005-03-29 |
| 6862124 | Semiconductor optical modulator, mach-zehnder optical modulator employing the same, and method of manufacturing semiconductor optical modulator | Suguru Akiyama | 2005-03-01 |
| 6836573 | Directional coupler type optical modulator with traveling-wave electrode | — | 2004-12-28 |
| 6710378 | Semiconductor light reception device of end face light incidence type | Masao Makiuchi, Nami Yasuoka, Takuya Fujii | 2004-03-23 |
| 6579737 | Optical semiconductor module, its manufacture, reflection film, its manufacture, and laser and optical devices using reflection film | Yoshihiro Yoneda, Akira Fukushima, Hajime Shoji | 2003-06-17 |
| 6448583 | Optical semiconductor module, its manufacture, reflection film, its manufacture, and laser and optical devices using reflection film | Yoshihiro Yoneda, Akira Fukushima, Hajime Shoji | 2002-09-10 |
| 6238943 | Optical semiconductor device and a method of manufacturing the same | Hirohiko Kobayashi, Mitsuru Ekawa, Nirou Okazaki, Shouichi Ogita, Haruhiko Tabuchi +1 more | 2001-05-29 |
| 6081632 | Method of producing optical waveguide system, optical device and optical coupler employing the same, optical network and optical circuit board | Tetsuzo Yoshimura, Wataru Sotoyama, Katsusada Motoyoshi, Takeshi Ishitsuka, Koji Tsukamoto +4 more | 2000-06-27 |
| 6044097 | Modulator integrated distributed feed-back laser diode module and device using the same | Hiromitsu Kawamura, Kazuhiro Yamaji, Hisashi Hamaguchi, Kiyotsugu Kamite | 2000-03-28 |
| 5987046 | Optical semiconductor device and a method of manufacturing the same | Hirohiko Kobayashi, Mitsuru Ekawa, Nirou Okazaki, Shouichi Ogita, Haruhiko Tabuchi +1 more | 1999-11-16 |
| 5805627 | Laser diode and optical communications system using such laser diode | Shinichi Kubota | 1998-09-08 |
| 5408487 | Semiconductor laser | Toru Uchida, Chikashi Anayama, Susumu Yamazaki, Hirohide Kurakake, Akito Kuramata | 1995-04-18 |
| 4726031 | Semiconductor laser | Kiyohide Wakao | 1988-02-16 |