Issued Patents All Time
Showing 126–150 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8244138 | Polarization-multiplexing optical transmitter polarization-multiplexing optical receiver, polarization-multiplexing optical transceiving system, and controlling method thereof | Jens Rasmussen | 2012-08-14 |
| 8145069 | Optical transmitter | Toshiki Tanaka, Hisao Nakashima, Yuichi Akiyama | 2012-03-27 |
| 8116635 | Polarization multiplexing and transmitting apparatus | Takahito Tanimura, Hisao Nakashima, Shoichiro Oda | 2012-02-14 |
| 8086113 | Optical receiver | Hisao Nakashima, Takahito Tanimura | 2011-12-27 |
| 8014685 | Coherent optical receiver | — | 2011-09-06 |
| 7983564 | Transmission system and transmission method | Hiroki Ooi, Akira Miura, Kentaro Nakamura, Yasushi Sugaya, Ryosuke Goto | 2011-07-19 |
| 7907324 | Optical modulator and controlling method and apparatus thereof | Yuichi Akiyama | 2011-03-15 |
| 7869715 | Dispersion compensating apparatus and dispersion compensation control method | Hiroki Ooi, Hiroshi Onaka | 2011-01-11 |
| 7869719 | Method and system for automatic feedback control for fine tuning a delay interferometer | Seemant Choudhary | 2011-01-11 |
| 7860394 | Optical receiver and optical reception method compatible with differential quadrature phase shift keying | — | 2010-12-28 |
| 7860408 | Interferometer for demodulating differential M-phase shift keying signal | Akihiko Isomura, Jens Rasmussen, Takafumi Terahara, Kentaro Nakamura, George Ishikawa +7 more | 2010-12-28 |
| 7848659 | Optical transmitting apparatus and optical communication system | Akira Miura, Kentaro Nakamura, Hiroshi Onaka, Yuichi Akiyama, Hiroki Ooi +1 more | 2010-12-07 |
| 7817923 | Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them | Yuichi Akiyama, Yutaka Kai, Hiroki Ooi, Kentaro Nakamura, Naoki Kuwata +3 more | 2010-10-19 |
| 7792436 | Optical receiver corresponding to differential M-phase shift keying system | Nobuhiro Fukushima | 2010-09-07 |
| 7773283 | Optical modulation device and optical modulation method | Toshiki Tanaka, Hideyuki Miyata, Yuichi Akiyama | 2010-08-10 |
| 7751721 | Optical DQPSK receiver apparatus | Kazuo Hironishi | 2010-07-06 |
| 7720392 | Differential quadrature phase-shift modulator and method for setting driving voltage thereof | Hisao Nakashima | 2010-05-18 |
| 7706695 | Optical DQPSK receiver apparatus | Kazuo Hironishi | 2010-04-27 |
| 7689133 | Optical signal reception device and method of controlling optical signal reception | Toru Katagiri, Tomoo Takahara, Kentaro Nakamura, Naoki Kuwata | 2010-03-30 |
| 7684713 | Phase control apparatus and optical DQPSK receiver | Yoshikazu Terayama, Noriaki Mizuguchi, Eiji Ishikawa, Takashi Toyomaki, Kenichi Kaburagi +2 more | 2010-03-23 |
| 7680419 | Repeater and repeating method | Hisao Nakashima | 2010-03-16 |
| 7631378 | Optical waveform shaper | Kazuo Hironishi, Hiroshi Onaka | 2009-12-15 |
| 7630650 | Multi-level modulation receiving device | Hisao Nakashima | 2009-12-08 |
| 7620321 | Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus | Akira Miura, Hiroki Ooi, Takafumi Terahara | 2009-11-17 |
| 7613403 | Differential multilevel modulated optical signal receiver apparatus | Kazuo Hironishi | 2009-11-03 |