Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12372721 | Depolarizer and optical amplifier excitation apparatus | Shoichiro Kuwahara, Yoshiaki Kisaka | 2025-07-29 |
| 12170542 | Optical transmitter | Hiroshi Yamazaki, Yutaka Miyamoto | 2024-12-17 |
| 11822161 | Bias voltage adjustment apparatus and IQ optical modulation system | Shoichiro Kuwahara, Yoshiaki Kisaka | 2023-11-21 |
| 11711198 | Synchronous detection apparatus, synchronous detection method, and program | Shoichiro Kuwahara, Yoshiaki Kisaka | 2023-07-25 |
| 11646800 | Optical transmitter and method for controller optical transmitter | Shogo Yamanaka, Yusuke Nasu | 2023-05-09 |
| 11397363 | Automatic bias control circuit | Shoichiro Kuwahara, Yoshiaki Kisaka, Masanori Nakamura | 2022-07-26 |
| 11194219 | Optical modulator | Hiroshi Yamazaki, Yutaka Miyamoto | 2021-12-07 |
| 11159242 | Optical transmitter | Akira Hirano | 2021-10-26 |
| 10823989 | Bias control circuit and bias control method | Shoichiro Kuwahara, Akira Hirano | 2020-11-03 |
| 10536238 | Optical transmission system, optical transmission apparatus, and optical reception apparatus | Kohki Shibahara, Takayuki Mizuno, Yutaka Miyamoto | 2020-01-14 |
| 10313015 | Optical transmitter and bias voltage control method | Shoichiro Kuwahara, Akira Hirano | 2019-06-04 |
| 10243664 | Optical modulator driver circuit and optical transmitter | Munehiko Nagatani, Hideyuki Nosaka, Toshihiro Itoh, Koichi Murata, Hiroyuki Fukuyama +15 more | 2019-03-26 |
| 10090921 | Light modulation device and light modulation method | Mikio Yoneyama, Takashi Ono, Akihiko Matsuura, Tomoyoshi Kataoka, Katsuya Tanaka +2 more | 2018-10-02 |
| 9116368 | Optical modulation device and bias voltage control method | Eiji Yoshida, Yutaka Miyamoto | 2015-08-25 |
| 9020361 | Optical signal transmitter, and bias voltage control method | Eiji Yoshida, Masahiro Tachibana | 2015-04-28 |
| 7995930 | Optical receiver using Mach-Zehnder interferometer | Mikio Yoneyama, Fumiaki Saitou, Shigeru Ono, Yosuke Takeuchi, Kazushige Yonenaga +3 more | 2011-08-09 |
| 7379236 | Optical fiber communication system using remote pumping | Hiroji Masuda, Yutaka Miyamoto | 2008-05-27 |
| 6263139 | Optical transmission system with group velocity dispersion compensation | Yutaka Miyamoto | 2001-07-17 |
| 5265136 | Sodium cooled fast reactor | Hiroshi Yamazaki | 1993-11-23 |