Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12326642 | Wavelength filter and laser apparatus | Yukie Iga, Hirotomo Izumi, Kazumasa Takabayashi | 2025-06-10 |
| 11984696 | Optical amplifier and inspection method of optical amplifier | Kazumasa Takabayashi | 2024-05-14 |
| 11022811 | Optical amplifier and optical switch device | Kazuhiro Ikeda, Takeshi Matsumoto, Hitoshi Kawashima, Keijiro Suzuki, Ken Tanizawa | 2021-06-01 |
| 10630389 | Optical transceiver device and optical transceiver module that includes optical transceiver device | Shuntaro Makino, Kohei Shibata | 2020-04-21 |
| 10530119 | Wavelength locker, wavelength tunable laser apparatus, and method for controlling wavelength tunable laser apparatus | Kazumasa Takabayashi | 2020-01-07 |
| 10312663 | Tunable laser device | Kazumasa Takabayashi, Tsuyoshi Yamamoto | 2019-06-04 |
| 9874768 | Optical modulation device | Takeshi Baba, Tatsuya Usuki | 2018-01-23 |
| 9709830 | Phase modulation device and method of controlling the device | — | 2017-07-18 |
| 9650167 | Sealing device | Kazukuni Yamada, Kazuyoshi Tarumoto, Yasuo Hashimoto, Junichi Kawaguchi | 2017-05-16 |
| 9229251 | Optical modulator and optical transmitter | Takeshi Baba | 2016-01-05 |
| 8718413 | Optical modulation apparatus and optical modulation/integration apparatus | — | 2014-05-06 |
| 8472494 | Semiconductor laser silicon waveguide substrate, and integrated device | — | 2013-06-25 |
| 8068744 | Optical transmitter | Tsuyoshi Yamamoto | 2011-11-29 |
| 7889773 | Semiconductor device | — | 2011-02-15 |
| 7738794 | Optical transmitter | Tsuyoshi Yamamoto | 2010-06-15 |
| 7321702 | Optical modulator, optical transmitter, optical modulating method and manufacturing method of the optical modulator | Tsuyoshi Yamamoto | 2008-01-22 |
| 6872966 | Optical semiconductor device | Haruhisa Soda, Shigeaki Sekiguchi | 2005-03-29 |
| 6862124 | Semiconductor optical modulator, mach-zehnder optical modulator employing the same, and method of manufacturing semiconductor optical modulator | Haruhisa Soda | 2005-03-01 |