Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10044463 | Optical transceiving apparatus, optical transmitting method, and optical transmitting device | Hiroaki Tomofuji | 2018-08-07 |
| 9667342 | Optical phase noise extracting device and optical phase noise extraction method | Takahiro Makimoto | 2017-05-30 |
| 9608734 | Optical transmission system, optical reception apparatus, and signal adjustment method | Makoto Murakami | 2017-03-28 |
| 9577747 | Photodetection device, photodetection method, and optical transmission device | Naoki Yamamoto | 2017-02-21 |
| 9537570 | Optical transceiving apparatus, optical transmitting method, and optical transmitting device | Hiroaki Tomofuji | 2017-01-03 |
| 9325424 | Optical phase compensation device, optical receiver, and optical phase compensation method | — | 2016-04-26 |
| 8731409 | Method for controlling polarization multiplexed optical signal | Yuichi Akiyama | 2014-05-20 |
| 8670665 | Optical apparatus using polarized orthogonal control | Takashi Toyomaki, Yoichi Oikawa | 2014-03-11 |
| 8655170 | OSNR monitor device and OSNR measurement device | Norifumi Shukunami, Kentaro Nakamura | 2014-02-18 |
| 8538265 | Optical communication device and dispersion compensation method | Kenichi Kaburagi | 2013-09-17 |
| 8472810 | Optical signal transmitter and method for controlling polarization multiplexed optical signal | Yuichi Akiyama | 2013-06-25 |
| 8364038 | Polarization multiplexed optical transmitter and method for controlling polarization multiplexed optical signal | Yuichi Akiyama | 2013-01-29 |
| 8351800 | Optical receiver and clock generation method | Kiyotoshi Noheji | 2013-01-08 |
| 8121492 | Optical transmitting apparatus | Yuichi Akiyama, Hideyuki Miyata | 2012-02-21 |
| 8064780 | Receiving device and receiving method | Takahiro Makimoto | 2011-11-22 |
| 7991301 | Detecting abnormality in an optical receiver | Takashi Toyomaki, Yoshikazu Terayama, Kenichi Kaburagi | 2011-08-02 |
| 7684713 | Phase control apparatus and optical DQPSK receiver | Yoshikazu Terayama, Eiji Ishikawa, Takashi Toyomaki, Kenichi Kaburagi, Takeshi Hoshida +2 more | 2010-03-23 |
| 7676162 | Phase monitor used in optical receiver | Akihiko Isomura, Jens Rasmussen, Zhenning Tao, Kenichi Kaburagi | 2010-03-09 |
| 5966938 | Peltier control circuit and a peltier device structure | Yasunori Nagakubo, Takashi Tsuda, Tetsuo Ishizaka, Shunichi Sato, Saeko Yokoi +2 more | 1999-10-19 |
| 5808571 | Synchronization control unit which maintains synchronization between serial-to-parallel converters operating in parallel, or between parallel-to-serial converters operating in parallel | Naoki Kuwata, Tetsuji Sato, Tetsuya Kiyonaga | 1998-09-15 |
| 5515682 | Peltier control circuit and a peltier device structure | Yasunori Nagakubo, Takashi Tsuda, Tetsuo Ishizaka, Shunichi Sato, Saeko Yokoi +2 more | 1996-05-14 |