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Patents Grants
last 30 patents
Information
Patent Grant
Optical network device and method for monitoring transmission line
Patent number
11,742,978
Issue date
Aug 29, 2023
Fujitsu Limited
Kazuyuki Tajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter and control method for optical transmitter
Patent number
11,558,121
Issue date
Jan 17, 2023
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication device and communication method
Patent number
11,228,367
Issue date
Jan 18, 2022
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission line monitoring device and transmission line monitorin...
Patent number
11,146,332
Issue date
Oct 12, 2021
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical network device and method for monitoring transmission line
Patent number
10,999,659
Issue date
May 4, 2021
Fujitsu Limited
Kazuyuki Tajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Parameter analysis method and apparatus
Patent number
10,972,178
Issue date
Apr 6, 2021
Fujitsu Limited
Takahito Tanimura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data collecting device and optical transmission system
Patent number
10,853,719
Issue date
Dec 1, 2020
Fujitsu Limited
Takahito Tanimura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Transmission apparatus, reception apparatus, and method for estimat...
Patent number
10,720,992
Issue date
Jul 21, 2020
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Receiver and receiving method
Patent number
10,554,325
Issue date
Feb 4, 2020
Fujitsu Limited
Tomohiro Yamauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, optical transmission apparatus, and optical mo...
Patent number
10,425,166
Issue date
Sep 24, 2019
Fujitsu Limited
Tomohiro Yamauchi
G02 - OPTICS
Information
Patent Grant
Monitor device and monitor method for monitoring transmission line
Patent number
10,419,117
Issue date
Sep 17, 2019
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, optical receiver and optical transmission method
Patent number
10,313,017
Issue date
Jun 4, 2019
Fujitsu Limited
Takahito Tanimura
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
Location measurement apparatus, light modulation converter, and lig...
Patent number
10,193,621
Issue date
Jan 29, 2019
Fujitsu Limited
Tomoyuki Kato
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission device, transmission system, and transmission...
Patent number
9,787,396
Issue date
Oct 10, 2017
Fujitsu Limited
Kiichi Sugitani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission device, nonlinear distortion compensation meth...
Patent number
9,654,224
Issue date
May 16, 2017
Fujitsu Limited
Tomofumi Oyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter and waveform distortion correction method
Patent number
9,654,216
Issue date
May 16, 2017
Fujitsu Limited
Hisao Nakashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical add-drop multiplexer
Patent number
9,634,787
Issue date
Apr 25, 2017
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission device, receiving device, and communication method
Patent number
9,571,224
Issue date
Feb 14, 2017
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter and method of optical transmission
Patent number
9,553,674
Issue date
Jan 24, 2017
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
9,467,228
Issue date
Oct 11, 2016
Fujitsu Limited
Hisao Nakashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent receiving apparatus
Patent number
9,444,554
Issue date
Sep 13, 2016
Fujitsu Limited
Nobukazu Koizumi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Non-linear distortion compensator, method of compensating non-linea...
Patent number
9,363,014
Issue date
Jun 7, 2016
Fujitsu Limited
Tomofumi Oyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter and optical signal transmission method
Patent number
9,356,689
Issue date
May 31, 2016
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission/reception system, optical transmitter, optical...
Patent number
8,942,569
Issue date
Jan 27, 2015
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver, optical reception method and optical reception sy...
Patent number
8,934,789
Issue date
Jan 13, 2015
Fujitsu Limited
Kiichi Sugitani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal processing device and optical receiving device
Patent number
8,923,708
Issue date
Dec 30, 2014
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light source
Patent number
8,849,128
Issue date
Sep 30, 2014
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distortion compensator, optical receiver, distortion compensator an...
Patent number
8,805,207
Issue date
Aug 12, 2014
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion monitor and method, chromatic dispersion compe...
Patent number
8,798,477
Issue date
Aug 5, 2014
Fujitsu Limited
Ling Liu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL NETWORK DEVICE AND METHOD FOR MONITORING TRANSMISSION LINE
Publication number
20220209884
Publication date
Jun 30, 2022
Fujitsu Limited
Kazuyuki TAJIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER AND CONTROL METHOD FOR OPTICAL TRANSMITTER
Publication number
20220109506
Publication date
Apr 7, 2022
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION LINE MONITORING DEVICE AND TRANSMISSION LINE MONITORIN...
Publication number
20210306073
Publication date
Sep 30, 2021
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL NETWORK DEVICE AND METHOD FOR MONITORING TRANSMISSION LINE
Publication number
20210092498
Publication date
Mar 25, 2021
Fujitsu Limited
KAZUYUKI TAJIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE AND COMMUNICATION METHOD
Publication number
20200153504
Publication date
May 14, 2020
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PARAMETER ANALYSIS METHOD AND APPARATUS
Publication number
20190280766
Publication date
Sep 12, 2019
Fujitsu Limited
Takahito Tanimura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TRANSMITTER, RECEIVER, AND TRANSMIT METHOD
Publication number
20190089479
Publication date
Mar 21, 2019
Fujitsu Limited
Tomohiro YAMAUCHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL TRANSMISSION APPARATUS, AND OPTICAL MO...
Publication number
20190020418
Publication date
Jan 17, 2019
Fujitsu Limited
Tomohiro YAMAUCHI
G02 - OPTICS
Information
Patent Application
TRANSMISSION APPARATUS, RECEPTION APPARATUS, AND METHOD FOR ESTIMAT...
Publication number
20180375580
Publication date
Dec 27, 2018
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LOCATION MEASUREMENT APPARATUS, LIGHT MODULATION CONVERTER, AND LIG...
Publication number
20180316422
Publication date
Nov 1, 2018
Fujitsu Limited
Tomoyuki Kato
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MONITOR DEVICE AND MONITOR METHOD FOR MONITORING TRANSMISSION LINE
Publication number
20180234184
Publication date
Aug 16, 2018
Fujitsu Limited
Takahito TANIMURA
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
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL RECEIVER AND OPTICAL TRANSMISSION METHOD
Publication number
20180026724
Publication date
Jan 25, 2018
Fujitsu Limited
Takahito TANIMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DATA COLLECTING DEVICE AND OPTICAL TRANSMISSION SYSTEM
Publication number
20170161602
Publication date
Jun 8, 2017
Fujitsu Limited
Takahito Tanimura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
OPTICAL TRANSMISSION DEVICE, TRANSMISSION SYSTEM, AND TRANSMISSION...
Publication number
20170026114
Publication date
Jan 26, 2017
Fujitsu Limited
KIICHI SUGITANI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL ADD-DROP MULTIPLEXER
Publication number
20160373206
Publication date
Dec 22, 2016
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION DEVICE, RECEIVING DEVICE, AND COMMUNICATION METHOD
Publication number
20160149666
Publication date
May 26, 2016
Fujitsu Limited
Takahito TANIMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER AND WAVEFORM DISTORTION CORRECTION METHOD
Publication number
20160099776
Publication date
Apr 7, 2016
Fujitsu Limited
Hisao NAKASHIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE, NONLINEAR DISTORTION COMPENSATION METH...
Publication number
20160065312
Publication date
Mar 3, 2016
Fujitsu Limited
Tomofumi Oyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER AND METHOD OF OPTICAL TRANSMISSION
Publication number
20150188637
Publication date
Jul 2, 2015
Fujitsu Limited
Takahito TANIMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
NON-LINEAR DISTORTION COMPENSATOR, METHOD OF COMPENSATING NON-LINEA...
Publication number
20150071630
Publication date
Mar 12, 2015
Fujitsu Limited
Tomofumi Oyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20140341587
Publication date
Nov 20, 2014
Hisao NAKASHIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER, OPTICAL RECEPTION METHOD AND OPTICAL RECEPTION SY...
Publication number
20140119731
Publication date
May 1, 2014
FUJITSU LIMITED
Kiichi Sugitani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL COHERENT RECEIVING APPARATUS
Publication number
20140029959
Publication date
Jan 30, 2014
Fujitsu Limited
Nobukazu KOIZUMI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER AND OPTICAL SIGNAL TRANSMISSION METHOD
Publication number
20130302031
Publication date
Nov 14, 2013
Fujitsu Limited
Takahito TANIMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DISTORTION COMPENSATOR, OPTICAL RECEIVER, DISTORTION COMPENSATOR AN...
Publication number
20130148967
Publication date
Jun 13, 2013
Fujitsu Limited
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-WAVELENGTH LIGHT SOURCE
Publication number
20120243880
Publication date
Sep 27, 2012
Fujitsu Limited
Shoichiro ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER AND OPTICAL TRANSMISSION SYSTEM
Publication number
20120177383
Publication date
Jul 12, 2012
Fujitsu Limited
Takahito TANIMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS AND METHOD
Publication number
20120141131
Publication date
Jun 7, 2012
FUJITSU LIMITED
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
POLARIZATION MULTIPLEXING AND TRANSMITTING APPARATUS
Publication number
20120106962
Publication date
May 3, 2012
FUJITSU LIMITED
Takahito Tanimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE