Issued Patents All Time
Showing 1–25 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11968033 | Optical transmission device, optical transmission system, and optical transmitting power control method | Tomohiro Yamauchi, Takafumi Terahara | 2024-04-23 |
| 11876559 | Optical transmission system and fiber type determination method | Takafumi Terahara, Hiroki Oi | 2024-01-16 |
| 11387912 | Wavelength converter and fiber optic transmission system | Tomoyuki Kato | 2022-07-12 |
| 11163119 | Wavelength conversion device and method of performing wavelength conversion | Tomohiro Yamauchi, Tomoyuki Kato, Takeshi Hoshida | 2021-11-02 |
| 10955727 | Wavelength converter and transmission apparatus | Tomoyuki Kato, Takeshi Hoshida, Masaaki Kawai | 2021-03-23 |
| 10948802 | Wavelength converter apparatus and method of performing wavelength conversion | Tomoyuki Kato, Takeshi Hoshida | 2021-03-16 |
| 10797799 | Optical transmission apparatus, optical transmission system, and optical transmission method | Kyosuke Sone, Yoshio Hirose, Takeshi Hoshida, Setsuo Yoshida | 2020-10-06 |
| 10763986 | Transmission device, optical termination device, transmission system, and transmission method | Kyosuke Sone, Yoshio Hirose | 2020-09-01 |
| 10567082 | Optical terminal device, optical terminating device, and communication control method | Kyosuke Sone, Yoshio Hirose | 2020-02-18 |
| 10268227 | Transmission apparatus, transmission system and data detection method | Setsuo Yoshida | 2019-04-23 |
| 10261350 | Optical transmitting apparatus and optical level control method | Yoshio Hirose, Kyosuke Sone | 2019-04-16 |
| 10200132 | Optical communication system, transmission station, and method of optical communication | Kyosuke Sone, Yasuhiko Aoki | 2019-02-05 |
| 10187172 | Optical transport apparatus and optical-wavelength defragmenting method | Yasuhiko Aoki, Kyosuke Sone | 2019-01-22 |
| 10158422 | Apparatus and method for estimating optical transmission performance | Shoichiro Oda, Masatake Miyabe, Setsuo Yoshida, Yasuhiko Aoki, Toru Katagiri +2 more | 2018-12-18 |
| 10069567 | Optical communication system, optical receiver and optical transmitter | — | 2018-09-04 |
| 9838148 | Optical receiver and superimposed signal detecting method | Tomohiro Yamauchi, GUOXIU HUANG, Setsuo Yoshida, Shoichiro Oda, Kyosuke Sone +1 more | 2017-12-05 |
| 9705604 | Communication device and wavelength adjustment method | Kyosuke Sone, Setsuo Yoshida, Shoichiro Oda, 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, Tomohiro Yamauchi, Kyosuke Sone | 2017-07-04 |
| 9496953 | Device and method for monitoring optical signal quality, and optical transmission device | Yasuhiko Aoki | 2016-11-15 |
| 9444573 | Transmission device and optical transmission system | Shoichiro Oda | 2016-09-13 |
| 9350479 | Apparatus and method for monitoring wavelength tunable optical filter | Kyosuke Sone, Yasuhiko Aoki, Shoichiro Oda | 2016-05-24 |
| 9143242 | Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer | Kyosuke Sone, Shoichiro Oda, Yasuhiko Aoki | 2015-09-22 |
| 9019593 | Optical amplification apparatus | Setsuo Yoshida, Susumu Kinoshita, George Ishikawa, Yutaka Kai, Kyosuke Sone +1 more | 2015-04-28 |
| 8942567 | Optical receiving device and communication system | Susumu Kinoshita | 2015-01-27 |
| 8896914 | Optical amplifying device | Susumu Kinoshita | 2014-11-25 |