Hisao Nakashima

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Polarization variation monitoring system and polarization variation...
- Patent number 12,047,115
- Issue date Jul 23, 2024
- Fujitsu Limited
- Ichiro Yokokura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Quantizer and optical transmitter
- Patent number 11,956,018
- Issue date Apr 9, 2024
- Fujitsu Limited
- Guoxiu Huang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal processing device and transmission device
- Patent number 11,476,946
- Issue date Oct 18, 2022
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical modulator and control method of optical modulator
- Patent number 11,460,750
- Issue date Oct 4, 2022
- Fujitsu Limited
- Guoxiu Huang
- G02 - OPTICS
Information Patent Grant
Transmission reception device and distortion compensation method
- Patent number 11,349,632
- Issue date May 31, 2022
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission device and optical transmission method
- Patent number 11,309,968
- Issue date Apr 19, 2022
- Fujitsu Limited
- Anh Ha Ngo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device and transmission method
- Patent number 11,303,483
- Issue date Apr 12, 2022
- Fujitsu Limited
- Guoxiu Huang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive equalizer, optical receiver, and optical transmission system
- Patent number 11,159,352
- Issue date Oct 26, 2021
- Fujitsu Limited
- Daisuke Sasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive equalizer, optical receiver, and adaptive equalization method
- Patent number 11,146,428
- Issue date Oct 12, 2021
- Fujitsu Limited
- Daisuke Sasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Reception device and method of detecting supervisory control signal
- Patent number 10,873,410
- Issue date Dec 22, 2020
- Fujitsu Limited
- Yi Ge
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiver, optical transmission system, and reception proces...
- Patent number 10,862,592
- Issue date Dec 8, 2020
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal processing device and signal processing method
- Patent number 10,708,035
- Issue date Jul 7, 2020
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device, reception device, and transmission method
- Patent number 10,698,228
- Issue date Jun 30, 2020
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Imbalance compensation device, transmission device, and imbalance c...
- Patent number 10,567,077
- Issue date Feb 18, 2020
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmitter and skew compensation method
- Patent number 10,498,459
- Issue date Dec 3, 2019
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiving device and phase-error compensation method
- Patent number 10,439,732
- Issue date Oct 8, 2019
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission system and method
- Patent number 10,419,263
- Issue date Sep 17, 2019
- Fujitsu Limited
- Yi Ge
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication apparatus and method of controlling transmission signal
- Patent number 10,396,900
- Issue date Aug 27, 2019
- Fujitsu Limited
- Guoxiu Huang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device and signal monitoring method
- Patent number 10,374,703
- Issue date Aug 6, 2019
- Fujitsu Limited
- Shoichiro Oda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiving device and receiving method
- Patent number 10,348,407
- Issue date Jul 9, 2019
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmitter and control method for optical transmitter
- Patent number 10,341,027
- Issue date Jul 2, 2019
- Fujitsu Limited
- Guoxiu Huang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission apparatus, transmission system, and transmission contr...
- Patent number 10,277,313
- Issue date Apr 30, 2019
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal processing device used in optical receiver and signal proces...
- Patent number 10,277,328
- Issue date Apr 30, 2019
- Fujitsu Limited
- Tomofumi Oyama
- G02 - OPTICS
Information Patent Grant
Network controller and signal quality estimating method
- Patent number 10,256,903
- Issue date Apr 9, 2019
- Fujitsu Limited
- Shoichiro Oda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical reception apparatus, optical transmission apparatus, optica...
- Patent number 10,219,049
- Issue date Feb 26, 2019
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarization state detector, optical transmitter, and optical receiver
- Patent number 10,122,489
- Issue date Nov 6, 2018
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital signal processing circuit and signal processing device that...
- Patent number 10,090,927
- Issue date Oct 2, 2018
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmitter and control method of optical transmitter
- Patent number 10,063,322
- Issue date Aug 28, 2018
- Fujitsu Limited
- Yuichi Akiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Error correction circuit and optical transmission system
- Patent number 10,057,012
- Issue date Aug 21, 2018
- Fujitsu Limited
- Yi Ge
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network controller and signal quality estimating method
- Patent number 9,906,296
- Issue date Feb 27, 2018
- Fujitsu Limited
- Shoichiro Oda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL TRANSMITTER THAT TRANSMITS MULTI-LEVEL SIGNAL
- Publication number 20240137127
- Publication date Apr 25, 2024
- Fujitsu Limited
- GUOXIU HUANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PHASE COMPENSATING DEVICE, OPTICAL RECEIVER, AND PHASE COMPENSATING...
- Publication number 20240063997
- Publication date Feb 22, 2024
- Fujitsu Limited
- Yoshitaka NOMURA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NONLINEARITY COMPENSATION CIRCUIT, AND OPTICAL TRANSCEIVER
- Publication number 20230318709
- Publication date Oct 5, 2023
- Fujitsu Limited
- Hisao NAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
QUANTIZER AND OPTICAL TRANSMITTER
- Publication number 20230188217
- Publication date Jun 15, 2023
- Fujitsu Limited
- GUOXIU HUANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
POLARIZATION VARIATION MONITORING SYSTEM AND POLARIZATION VARIATION...
- Publication number 20230087839
- Publication date Mar 23, 2023
- Fujitsu Limited
- Ichiro YOKOKURA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
POLARIZATION VARIATION MONITORING SYSTEM AND POLARIZATION VARIATION...
- Publication number 20230082206
- Publication date Mar 16, 2023
- Fujitsu Limited
- Ichiro YOKOKURA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMITTER AND TRANSMISSION DEVICE
- Publication number 20220311534
- Publication date Sep 29, 2022
- Fujitsu Limited
- Yohei SOBU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SIGNAL PROCESSING DEVICE AND TRANSMISSION DEVICE
- Publication number 20220303021
- Publication date Sep 22, 2022
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD
- Publication number 20220006530
- Publication date Jan 6, 2022
- Fujitsu Limited
- Anh Ha Ngo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE AND DISTORTION COMPENSATION METHOD
- Publication number 20210297229
- Publication date Sep 23, 2021
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL MODULATOR AND CONTROL METHOD OF OPTICAL MODULATOR
- Publication number 20210223658
- Publication date Jul 22, 2021
- Fujitsu Limited
- GUOXIU HUANG
- G02 - OPTICS
Information Patent Application
ADAPTIVE EQUALIZER, OPTICAL RECEIVER, AND OPTICAL TRANSMISSION SYSTEM
- Publication number 20210160108
- Publication date May 27, 2021
- Fujitsu Limited
- Daisuke SASAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ADAPTIVE EQUALIZER, OPTICAL RECEIVER, AND ADAPTIVE EQUALIZATION METHOD
- Publication number 20210152403
- Publication date May 20, 2021
- Fujitsu Limited
- Daisuke SASAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSCEIVER AND METHOD FOR MONITORING VARIATION IN POLARIZA...
- Publication number 20200313771
- Publication date Oct 1, 2020
- Fujitsu Limited
- Hisao NAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE, RECEPTION DEVICE, AND TRANSMISSION METHOD
- Publication number 20190331931
- Publication date Oct 31, 2019
- Fujitsu Limited
- Tomofumi Oyama
- G02 - OPTICS
Information Patent Application
SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD
- Publication number 20190215145
- Publication date Jul 11, 2019
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE AND SIGNAL MONITORING METHOD
- Publication number 20190081701
- Publication date Mar 14, 2019
- Fujitsu Limited
- Shoichiro Oda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL RECEIVER, OPTICAL TRANSMISSION SYSTEM, AND RECEPTION PROCES...
- Publication number 20190044619
- Publication date Feb 7, 2019
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMITTER AND CONTROL METHOD FOR OPTICAL TRANSMITTER
- Publication number 20190028205
- Publication date Jan 24, 2019
- Fujitsu Limited
- GUOXIU HUANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION SYSTEM AND METHOD
- Publication number 20190020531
- Publication date Jan 17, 2019
- FUJITSU LIMITED
- Yi Ge
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL RECEPTION APPARATUS, OPTICAL TRANSMISSION APPARATUS, OPTICA...
- Publication number 20180376226
- Publication date Dec 27, 2018
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMITTER AND SKEW COMPENSATION METHOD
- Publication number 20180367220
- Publication date Dec 20, 2018
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
IMBALANCE COMPENSATION DEVICE, TRANSMISSION DEVICE, RECEPTION DEVIC...
- Publication number 20180287699
- Publication date Oct 4, 2018
- Fujitsu Limited
- Tomofumi OYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION APPARATUS AND METHOD OF CONTROLLING TRANSMISSION SIGNAL
- Publication number 20180278336
- Publication date Sep 27, 2018
- Fujitsu Limited
- GUOXIU HUANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RECEPTION DEVICE AND METHOD OF DETECTING SUPERVISORY CONTROL SIGNAL
- Publication number 20180248643
- Publication date Aug 30, 2018
- Fujitsu Limited
- Yi Ge
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RECEIVING DEVICE AND RECEIVING METHOD
- Publication number 20180227056
- Publication date Aug 9, 2018
- Fujitsu Limited
- Hisao Nakashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD...
- Publication number 20180175933
- Publication date Jun 21, 2018
- Fujitsu Limited
- Yoshitaka Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NETWORK CONTROLLER AND SIGNAL QUALITY ESTIMATING METHOD
- Publication number 20180097562
- Publication date Apr 5, 2018
- Fujitsu Limited
- Shoichiro Oda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RECEIVING DEVICE AND PHASE-ERROR COMPENSATION METHOD
- Publication number 20180076903
- Publication date Mar 15, 2018
- Fujitsu Limited
- Tomofumi Oyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SIGNAL PROCESSING DEVICE USED IN OPTICAL RECEIVER AND SIGNAL PROCES...
- Publication number 20180034552
- Publication date Feb 1, 2018
- Fujitsu Limited
- Tomofumi Oyama
- G02 - OPTICS

Hisao Nakashima

Person

Patents Grantslast 30 patents

Polarization variation monitoring system and polarization variation...

Quantizer and optical transmitter

Signal processing device and transmission device

Optical modulator and control method of optical modulator

Transmission reception device and distortion compensation method

Optical transmission device and optical transmission method

Transmission device and transmission method

Adaptive equalizer, optical receiver, and optical transmission system

Adaptive equalizer, optical receiver, and adaptive equalization method

Reception device and method of detecting supervisory control signal

Optical receiver, optical transmission system, and reception proces...

Signal processing device and signal processing method

Transmission device, reception device, and transmission method

Imbalance compensation device, transmission device, and imbalance c...

Optical transmitter and skew compensation method

Receiving device and phase-error compensation method

Transmission system and method

Communication apparatus and method of controlling transmission signal

Transmission device and signal monitoring method

Receiving device and receiving method

Optical transmitter and control method for optical transmitter

Transmission apparatus, transmission system, and transmission contr...

Signal processing device used in optical receiver and signal proces...

Network controller and signal quality estimating method

Optical reception apparatus, optical transmission apparatus, optica...

Polarization state detector, optical transmitter, and optical receiver

Digital signal processing circuit and signal processing device that...

Optical transmitter and control method of optical transmitter

Error correction circuit and optical transmission system

Network controller and signal quality estimating method

Patents Applicationslast 30 patents

OPTICAL TRANSMITTER THAT TRANSMITS MULTI-LEVEL SIGNAL

PHASE COMPENSATING DEVICE, OPTICAL RECEIVER, AND PHASE COMPENSATING...

NONLINEARITY COMPENSATION CIRCUIT, AND OPTICAL TRANSCEIVER

QUANTIZER AND OPTICAL TRANSMITTER

POLARIZATION VARIATION MONITORING SYSTEM AND POLARIZATION VARIATION...

POLARIZATION VARIATION MONITORING SYSTEM AND POLARIZATION VARIATION...

OPTICAL TRANSMITTER AND TRANSMISSION DEVICE

SIGNAL PROCESSING DEVICE AND TRANSMISSION DEVICE

OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD

TRANSMISSION DEVICE AND DISTORTION COMPENSATION METHOD

OPTICAL MODULATOR AND CONTROL METHOD OF OPTICAL MODULATOR

ADAPTIVE EQUALIZER, OPTICAL RECEIVER, AND OPTICAL TRANSMISSION SYSTEM

ADAPTIVE EQUALIZER, OPTICAL RECEIVER, AND ADAPTIVE EQUALIZATION METHOD

OPTICAL TRANSCEIVER AND METHOD FOR MONITORING VARIATION IN POLARIZA...

TRANSMISSION DEVICE, RECEPTION DEVICE, AND TRANSMISSION METHOD

SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

TRANSMISSION DEVICE AND SIGNAL MONITORING METHOD

OPTICAL RECEIVER, OPTICAL TRANSMISSION SYSTEM, AND RECEPTION PROCES...

OPTICAL TRANSMITTER AND CONTROL METHOD FOR OPTICAL TRANSMITTER

TRANSMISSION SYSTEM AND METHOD

OPTICAL RECEPTION APPARATUS, OPTICAL TRANSMISSION APPARATUS, OPTICA...

OPTICAL TRANSMITTER AND SKEW COMPENSATION METHOD

IMBALANCE COMPENSATION DEVICE, TRANSMISSION DEVICE, RECEPTION DEVIC...

COMMUNICATION APPARATUS AND METHOD OF CONTROLLING TRANSMISSION SIGNAL

RECEPTION DEVICE AND METHOD OF DETECTING SUPERVISORY CONTROL SIGNAL

RECEIVING DEVICE AND RECEIVING METHOD

COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD...

NETWORK CONTROLLER AND SIGNAL QUALITY ESTIMATING METHOD

RECEIVING DEVICE AND PHASE-ERROR COMPENSATION METHOD

SIGNAL PROCESSING DEVICE USED IN OPTICAL RECEIVER AND SIGNAL PROCES...