Issued Patents All Time
Showing 26–50 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10429721 | Wavelength conversion device, control-light generation device, wavelength conversion method, and control-light generation method | Tomoyuki Kato, Shigeki Watanabe | 2019-10-01 |
| 10425166 | Optical transmitter, optical transmission apparatus, and optical modulation method | Tomohiro Yamauchi, Tomofumi Oyama, Takahito Tanimura, GUOXIU HUANG | 2019-09-24 |
| 10419117 | Monitor device and monitor method for monitoring transmission line | Takahito Tanimura | 2019-09-17 |
| 10419263 | Transmission system and method | Yi Ge, Hisao Nakashima, Yuichi Akiyama | 2019-09-17 |
| 10396900 | Communication apparatus and method of controlling transmission signal | GUOXIU HUANG, Setsuo Yoshida, Hisao Nakashima, Shoichiro Oda | 2019-08-27 |
| 10374703 | Transmission device and signal monitoring method | Shoichiro Oda, Hisao Nakashima, Yi Ge | 2019-08-06 |
| 10348407 | Receiving device and receiving method | Hisao Nakashima | 2019-07-09 |
| 10341027 | Optical transmitter and control method for optical transmitter | GUOXIU HUANG, Hisao Nakashima, Yuichi Akiyama | 2019-07-02 |
| 10313017 | Optical transmitter, optical receiver and optical transmission method | Takahito Tanimura | 2019-06-04 |
| 10281798 | Wavelength conversion device, control-light generation device, wavelength conversion method, and control-light generation method | Tomoyuki Kato, Shigeki Watanabe | 2019-05-07 |
| 10277328 | Signal processing device used in optical receiver and signal processing method | Tomofumi Oyama, Hisao Nakashima, Yoshitaka Nomura, Takahito Tanimura | 2019-04-30 |
| 10277313 | Transmission apparatus, transmission system, and transmission control method | Hisao Nakashima | 2019-04-30 |
| 10256903 | Network controller and signal quality estimating method | Shoichiro Oda, Yasuhiko Aoki, Hisao Nakashima, Hiroki Oi | 2019-04-09 |
| 10219049 | Optical reception apparatus, optical transmission apparatus, optical communication system, and skew adjusting method | Yoshitaka Nomura, Hisao Nakashima, Tomofumi Oyama, Yuichi Akiyama | 2019-02-26 |
| 10193621 | Location measurement apparatus, light modulation converter, and light variation location measurement method | Tomoyuki Kato, Shigeki Watanabe, Takahito Tanimura | 2019-01-29 |
| 10090961 | Multi-channel optical cross-phase modulation compensator | Inwoong Kim, Olga Vassilieva, Paparao Palacharla, Tadashi Ikeuchi | 2018-10-02 |
| 10090927 | Digital signal processing circuit and signal processing device that includes a plurality of digital signal processing circuits | Hisao Nakashima, Yoshitaka Nomura, Tomofumi Oyama, Yi Ge, Yuichi Akiyama +1 more | 2018-10-02 |
| 10057012 | Error correction circuit and optical transmission system | Yi Ge, Hisao Nakashima | 2018-08-21 |
| 10050738 | Low noise colorless, directionless, contentionless reconfigurable optical add/drop multiplexer | Youichi Akasaka, Tadashi Ikeuchi | 2018-08-14 |
| 9906296 | Network controller and signal quality estimating method | Shoichiro Oda, Yasuhiko Aoki, Hisao Nakashima, Hiroki Oi | 2018-02-27 |
| 9887798 | Transmission apparatus, reception apparatus and modulation method | Yoshitaka Nomura, Hisao Nakashima, Yuichi Akiyama | 2018-02-06 |
| 9882642 | Optical remodulator that remodulates modulated optical signal and optical remodulation method | — | 2018-01-30 |
| 9871596 | Optical receiver and signal processing method | Daijiro Tanaka, Hideyuki Matsuura, Osamu Takeuchi | 2018-01-16 |
| 9857662 | Optical frequency shift device and method | Tomoyuki Kato, Shigeki Watanabe | 2018-01-02 |
| 9853739 | Optical transmitter and method for controlling bias of optical modulator | Hisao Nakashima, Yuichi Akiyama | 2017-12-26 |