Issued Patents All Time
Showing 1–25 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12056603 | Optical communication element and optical neural network | Tomoyuki Akiyama, Shinsuke Tanaka, Yasuhiro Nakasha | 2024-08-06 |
| 11868026 | Optical AD converter and optical receiver | Tomoyuki Akiyama, Jun Matsui, Shinsuke Tanaka | 2024-01-09 |
| 11791906 | Optical demultiplexing device and transmission device | Tomoyuki Akiyama, Shinsuke Tanaka | 2023-10-17 |
| 11588572 | Wavelength converter and optical transmission device that includes wavelength converter | Tomoyuki Kato, Shigeki Watanabe | 2023-02-21 |
| 11558121 | Optical transmitter and control method for optical transmitter | Setsuo Yoshida, Shoichiro Oda, Kazuyuki Tajima, Takahito Tanimura | 2023-01-17 |
| 11533548 | Transmission device, transmission method, and transmission system | Tomohiro Yamauchi, Tomoyuki Kato, Shigeki Watanabe, Yu Tanaka | 2022-12-20 |
| 11438086 | Optical amplification in an optical network | Youichi Akasaka | 2022-09-06 |
| 11243349 | Wavelength conversion device and excitation light switching method | Tomohiro Yamauchi, Shingo Hara, Hiroki Satou | 2022-02-08 |
| 11228367 | Communication device and communication method | Takahito Tanimura | 2022-01-18 |
| 11190292 | Wavelength converter and optical transmission device that includes wavelength converter | Tomoyuki Kato, Shigeki Watanabe | 2021-11-30 |
| 11165502 | Optical transmission device and optical transmission system | Yi Ge, Shoichiro Oda, Yuichi Akiyama | 2021-11-02 |
| 11163119 | Wavelength conversion device and method of performing wavelength conversion | Tomohiro Yamauchi, Tomoyuki Kato, Goji Nakagawa | 2021-11-02 |
| 10999659 | Optical network device and method for monitoring transmission line | Kazuyuki Tajima, Takahito Tanimura, Setsuo Yoshida | 2021-05-04 |
| 10955727 | Wavelength converter and transmission apparatus | Goji Nakagawa, Tomoyuki Kato, Masaaki Kawai | 2021-03-23 |
| 10948802 | Wavelength converter apparatus and method of performing wavelength conversion | Goji Nakagawa, Tomoyuki Kato | 2021-03-16 |
| 10873410 | Reception device and method of detecting supervisory control signal | Yi Ge, Hisao Nakashima, Tomofumi Oyama, Yuichi Akiyama | 2020-12-22 |
| 10862592 | Optical receiver, optical transmission system, and reception processing method | Hisao Nakashima | 2020-12-08 |
| 10853719 | Data collecting device and optical transmission system | Takahito Tanimura | 2020-12-01 |
| 10797799 | Optical transmission apparatus, optical transmission system, and optical transmission method | Goji Nakagawa, Kyosuke Sone, Yoshio Hirose, Setsuo Yoshida | 2020-10-06 |
| 10749604 | Optical phase distortion compensating device and method of compensating optical phase distortion | Tomoyuki Kato | 2020-08-18 |
| 10720992 | Transmission apparatus, reception apparatus, and method for estimating characteristics of transmission line | Takahito Tanimura, Shigeki Watanabe, Tomoyuki Kato | 2020-07-21 |
| 10567077 | Imbalance compensation device, transmission device, and imbalance compensation method | Tomofumi Oyama, Yoshitaka Nomura, Hisao Nakashima | 2020-02-18 |
| 10554325 | Receiver and receiving method | Tomohiro Yamauchi, Takahito Tanimura, Rafael Puerta Ramirez | 2020-02-04 |
| 10498459 | Optical transmitter and skew compensation method | Yoshitaka Nomura, Tomofumi Oyama, Hisao Nakashima, Yuichi Akiyama | 2019-12-03 |
| 10439732 | Receiving device and phase-error compensation method | Tomofumi Oyama, Hisao Nakashima | 2019-10-08 |