Issued Patents All Time
Showing 101–125 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8660438 | Digital coherent receiver and receiving method | Hisao Nakashima, Kosuke Komaki | 2014-02-25 |
| 8649689 | Digital coherent receiving apparatus | Nobukazu Koizumi, Takahito Tanimura, Hisao Nakashima, Koji Nakamuta, Noriyasu Nakayama | 2014-02-11 |
| 8649685 | Light receiving device and light receiving method | Hisao Nakashima | 2014-02-11 |
| 8649678 | Frame processing apparatus, optical receiving apparatus, optical transceiving apparatus, optical transmission system, and frame processing controlling method | Katsumi Fukumitsu | 2014-02-11 |
| 8625996 | Optical transmitter, optical transmission method, and wavelength-selective variable delayer | Toshiki Tanaka, Hisao Nakashima, Toru Katagiri, Hiroki Ooi, Akira Miura | 2014-01-07 |
| 8594508 | Optical transmission system | Hisao Nakashima, Takahito Tanimura, Toru Katagiri, Shoichiro Oda | 2013-11-26 |
| 8565615 | Optical modulation apparatus and optical modulation method | Masato Nishihara, Tomoo Takahara | 2013-10-22 |
| 8526828 | Optical transmitter and optical transmitter unit | Hisao Nakashima | 2013-09-03 |
| 8515277 | Nonlinear distortion detecting circuit, optical receiver, optical transmission system, and method for detecting nonlinear distortion | Takahito Tanimura, Hisao Nakashima | 2013-08-20 |
| 8509628 | Differential multilevel modulated optical signal receiver apparatus | Kazuo Hironishi | 2013-08-13 |
| 8488975 | Optical transmitter, optical transmitter and receiver system, optical transmitting method and optical transmitting and receiving method | Shoichiro Oda, Takahito Tanimura | 2013-07-16 |
| 8447190 | Distortion compensating apparatus, optical receiving apparatus, and optical transmitting and receiving system | Takahito Tanimura, Hisao Nakashima, Kazunari Shiota, Kiichi Sugitani | 2013-05-21 |
| 8447186 | Distortion compensator, optical receiver, distortion compensator and optical receiver controlling methods, and optical transmission system | Takahito Tanimura, Hisao Nakashima, Shoichiro Oda | 2013-05-21 |
| 8437633 | Optical network and control method therefor | Shoichiro Oda | 2013-05-07 |
| 8406638 | Coherent light receiving system | — | 2013-03-26 |
| 8406635 | Optical communication system and optical receiver | Hisao Nakashima | 2013-03-26 |
| 8400702 | Optical modulation device and optical modulation method | Toshiki Tanaka, Hideyuki Miyata, Yuichi Akiyama | 2013-03-19 |
| 8391725 | Optical receiver for controlling wavelength of local oscillation light and local oscillation light control method | Shoichiro Oda, Hisao Nakashima, Takahito Tanimura | 2013-03-05 |
| 8380084 | Polarization multiplexing and transmitting apparatus | Takahito Tanimura | 2013-02-19 |
| 8374512 | Frequency offset monitoring device and optical coherent receiver | Zhenning Tao, Huijian Zhang, Lei Li | 2013-02-12 |
| 8351795 | Optical transmission system and optical transmission method | Hisao Nakashima, Takahito Tanimura, Toru Katagiri, Shoichiro Oda | 2013-01-08 |
| 8351797 | Repeater and repeating method | Hisao Nakashima | 2013-01-08 |
| 8331805 | Digital coherent optical receiver | Hisao Nakashima | 2012-12-11 |
| 8249464 | Optical receiver and method for optical reception | Shoichiro Oda, Hisao Nakashima, Takahito Tanimura, Yuichi Akiyama | 2012-08-21 |
| 8249466 | Polarization multiplexing optical receiver and polarization multiplexing optical transmission system | — | 2012-08-21 |