Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12374851 | Optical amplification apparatus and optical amplification method | Hitoshi Takeshita, Keiichi Matsumoto | 2025-07-29 |
| 12375201 | Optical amplifier, optical amplifier controlling method, and optical transmission system | Keiichi Matsumoto, Hitoshi Takeshita, Hidemi Noguchi | 2025-07-29 |
| 12308599 | Optical amplifier, optical amplifier equalizing method, and transmission system | Keiichi Matsumoto, Shigeyuki Yanagimachi | 2025-05-20 |
| 12072243 | Monitoring device, monitoring method, and optical transmission system | Keiichi Matsumoto, Hidemi Noguchi | 2024-08-27 |
| 12052055 | Method of equalizing waveform distortion, terminal device, and optical communication system | Shinsuke Fujisawa, Naoto Ishii, Ankith VINAYACHANDRAN, Fatih Yaman, Hussam G. Batshon | 2024-07-30 |
| 12027813 | Optical amplifier and optical amplification method | Hitoshi Takeshita, Keiichi Matsumoto | 2024-07-02 |
| 11990727 | Monitoring apparatus for optical amplifier, optical amplifying system, and method of monitoring amplified optical signal | Keiichi Matsumoto | 2024-05-21 |
| 11876339 | Optical amplifier, control method for optical amplifier, and optical communication system | Keiichi Matsumoto | 2024-01-16 |
| 11824320 | Optical amplifier, and control method therefor | Shigeyuki Yanagimachi | 2023-11-21 |
| 11398711 | Multicore optical fiber amplifier and optical amplification method using multicore optical fiber amplification medium | Shigeru Nakamura, Shigeyuki Yanagimachi | 2022-07-26 |
| 11374377 | Optical amplifying apparatus and method of amplifying optical signal | Shigeyuki Yanagimachi, Shigeru Nakamura, Keiichi Matsumoto | 2022-06-28 |
| 11329444 | Optical amplifier and control method therefor | Shigeru Nakamura, Shigeyuki Yanagimachi, Keiichi Matsumoto | 2022-05-10 |
| 11264776 | Optical amplifier, optical network including the same, and method for amplifying optical signal | Shigeru Nakamura | 2022-03-01 |
| 11212027 | Optical path setting device, optical communication system, and optical path setting method | Shinsuke Fujisawa, Hitoshi Takeshita, Shigeyuki Yanagimachi | 2021-12-28 |
| 11115117 | Submarine optical communication control device, control method, and non-transitory computer-readable medium | Shinsuke Fujisawa, Hitoshi Takeshita, Shigeyuki Yanagimachi | 2021-09-07 |
| 10567078 | Optical transmitter and method for controlling optical carrier frequency | — | 2020-02-18 |
| 10361779 | Optical transmission system, optical receiver, and method for detecting optical signal information | Manabu Arikawa, Toshiharu Ito | 2019-07-23 |
| 10225017 | Optical transmitter and method for controlling the same | — | 2019-03-05 |
| 10205528 | Optical transmitter and optical communication method | Hidemi Noguchi | 2019-02-12 |
| 10191307 | Optical transmission device and control method therefor | Sadao Fujita | 2019-01-29 |
| 9960789 | Optical transmitter, optical communication system, and optical communication method | Tatsuya Nakamura, Junichi Abe | 2018-05-01 |
| 9819525 | Signal generating apparatus and signal generating method | Daisaku Ogasahara, Shinsuke Fujisawa | 2017-11-14 |
| 9729229 | Optical spatial-division multiplexed transmission system and transmission method | Toshiharu Ito, Manabu Arikawa | 2017-08-08 |
| 9660762 | System and method for transmitting optical signal over multiple channels | Manabu Arikawa, Toshiharu Ito, Daisaku Ogasahara | 2017-05-23 |
| 9544060 | Optical transmitter and method for controlling the same | — | 2017-01-10 |