Issued Patents All Time
Showing 25 most recent of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12231227 | Transmission apparatus and transmission system | Xiang Zhang, Atsushi Kodama, Tatsuya Tsuzuki | 2025-02-18 |
| 11711160 | Transmission device and transmission system | Xiang Zhang, Tatsuya Tsuzuki | 2023-07-25 |
| 10797799 | Optical transmission apparatus, optical transmission system, and optical transmission method | Goji Nakagawa, Yoshio Hirose, Takeshi Hoshida, Setsuo Yoshida | 2020-10-06 |
| 10763986 | Transmission device, optical termination device, transmission system, and transmission method | Goji Nakagawa, Yoshio Hirose | 2020-09-01 |
| 10567082 | Optical terminal device, optical terminating device, and communication control method | Goji Nakagawa, Yoshio Hirose | 2020-02-18 |
| 10261350 | Optical transmitting apparatus and optical level control method | Goji Nakagawa, Yoshio Hirose | 2019-04-16 |
| 10230463 | Transmission device and method for measuring optical transmission characteristics | GUOXIU HUANG, Yasuhiko Aoki, Shoichiro Oda, Zhenning Tao, Setsuo Yoshida | 2019-03-12 |
| 10200132 | Optical communication system, transmission station, and method of optical communication | Yasuhiko Aoki, Goji Nakagawa | 2019-02-05 |
| 10187172 | Optical transport apparatus and optical-wavelength defragmenting method | Goji Nakagawa, Yasuhiko Aoki | 2019-01-22 |
| 9847837 | Optical line termination, communication system, and communication control method | Yasuhiko Aoki | 2017-12-19 |
| 9838148 | Optical receiver and superimposed signal detecting method | Goji Nakagawa, Tomohiro Yamauchi, GUOXIU HUANG, Setsuo Yoshida, Shoichiro Oda +1 more | 2017-12-05 |
| 9705604 | Communication device and wavelength adjustment method | Setsuo Yoshida, Goji Nakagawa, Shoichiro Oda, Yasuhiko Aoki | 2017-07-11 |
| 9705629 | Transmitting device and transmission control method | Yasuhiko Aoki | 2017-07-11 |
| 9698929 | Optical receiver that has function to detect signal superimposed on optical signal and method for receiving optical signal | Setsuo Yoshida, Goji Nakagawa, Tomohiro Yamauchi | 2017-07-04 |
| 9350479 | Apparatus and method for monitoring wavelength tunable optical filter | Yasuhiko Aoki, Goji Nakagawa, Shoichiro Oda | 2016-05-24 |
| 9185474 | Wavelength path switching method, optical communication system, optical communication device, optical repeater, and network management device | Yasuhiko Aoki, Takeshi Hoshida, Toshiki Tanaka, Shoichiro Oda | 2015-11-10 |
| 9143242 | Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer | Goji Nakagawa, Shoichiro Oda, Yasuhiko Aoki | 2015-09-22 |
| 9083459 | Optical transmission system, method of testing optical transmission system, and non-transitory computer-readable medium | Shoichiro Oda, Yasuhiko Aoki, Takeshi Hoshida | 2015-07-14 |
| 9019593 | Optical amplification apparatus | Setsuo Yoshida, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Yutaka Kai +1 more | 2015-04-28 |
| 8965202 | Optical power monitor, optical power control system and optical power monitor method | Yasuhiko Aoki, Takahito Tanimura, Toshiki Tanaka, Shoichiro Oda | 2015-02-24 |
| 8965219 | Repeater, relay method and optical transmission system | George Ishikawa, Susumu Kinoshita | 2015-02-24 |
| 8571058 | Terminal apparatus, data transmission system and data transmission method | George Ishikawa, Susumu Kinoshita | 2013-10-29 |
| 8564878 | Optical amplifier, control circuit, and optical amplifier control method | Setsuo Yoshida | 2013-10-22 |
| 8472110 | Optical amplifier, control circuit, and method of controlling optical amplifier | — | 2013-06-25 |
| 8463135 | Relay apparatus, signal processing apparatus and optical communication system | Yutaka Kai, George Ishikawa, Susumu Kinoshita | 2013-06-11 |