Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12425201 | Quantum key delivery system, quantum key delivery method, and storage medium | Tetsuo KAWAKAMI | 2025-09-23 |
| 10530489 | Optical signal reception apparatus, optical communication system, and method of generating compensation signal of optical signal reception apparatus | — | 2020-01-07 |
| 10530491 | Coherent optical receiver, device and method for detecting inter-lane skew in coherent optical receiver | Kiyoshi Fukuchi, Junichi Abe | 2020-01-07 |
| 10193593 | Signal processing device, communication system, and signal processing method | Kazunori Hayashi | 2019-01-29 |
| 10171177 | Digital signal processor, digital optical receiver using the same, and digital signal processing method | Hidemi Noguchi | 2019-01-01 |
| 9923641 | Signal processing device, optical communication system, and signal processing method | Junichi Abe, Daisaku Ogasahara | 2018-03-20 |
| 9853765 | Signal processing device and signal processing method for optical polarization multiplexed signal | Junichi Abe | 2017-12-26 |
| 9831956 | Signal processing device and signal processing method | Junichi Abe | 2017-11-28 |
| 9686019 | Coherent optical receiver, device and method for detecting inter-lane skew in coherent optical receiver | Kiyoshi Fukuchi, Junichi Abe | 2017-06-20 |
| 9485033 | Signal processing apparatus and signal processing method | Daisaku Ogasahara, Shinsuke Fujisawa | 2016-11-01 |
| 9246599 | Coherent optical receiver, apparatus and method for detecting interchannel skew in coherent optical receiver | Junichi Abe, Kiyoshi Fukuchi | 2016-01-26 |
| 9088370 | Coherent optical receiver, apparatus and method for detecting inter-channel skew in coherent optical receiver | Junichi Abe, Kiyoshi Fukuchi | 2015-07-21 |
| 8953953 | Coherent optical receiver, apparatus and method for detecting inter-channel skew in coherent optical receiver | Junichi Abe, Kiyoshi Fukuchi | 2015-02-10 |
| 8634727 | Coherent optical receiver, apparatus and method for detecting interchannel skew in coherent optical receiver | Junichi Abe, Kiyoshi Fukuchi | 2014-01-21 |
| 8626000 | Coherent optical receiver, apparatus and method for detecting inter-channel skew in coherent optical receiver | Junichi Abe, Kiyoshi Fukuchi | 2014-01-07 |
| 8515293 | Coherent receiver | Daisaku Ogasahara, Kiyoshi Fukuchi | 2013-08-20 |