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Kawasaki, JP
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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
Communication device that performs encrypted communication and comm...
Patent number
11,722,294
Issue date
Aug 8, 2023
Fujitsu Limited
Shoichiro Oda
G06 - COMPUTING CALCULATING COUNTING
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 that performs encrypted communication and comm...
Patent number
11,228,426
Issue date
Jan 18, 2022
Fujitsu Limited
Shoichiro Oda
G06 - COMPUTING CALCULATING COUNTING
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 transmission apparatus and estimation method
Patent number
11,050,484
Issue date
Jun 29, 2021
Fujitsu Limited
Shoichiro Oda
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
Optical transmission apparatus, optical transmission system, and op...
Patent number
10,797,799
Issue date
Oct 6, 2020
Fujitsu Limited
Goji Nakagawa
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
Device and method for measuring optical signal-to-noise ratio
Patent number
10,389,437
Issue date
Aug 20, 2019
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical signal-to-noise ratio measuring device and optical signal-t...
Patent number
10,374,701
Issue date
Aug 6, 2019
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmitter, receiver, and transmission method
Patent number
10,333,762
Issue date
Jun 25, 2019
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission apparatus, transmission system and data detection method
Patent number
10,268,227
Issue date
Apr 23, 2019
Fujitsu Limited
Goji Nakagawa
G05 - CONTROLLING REGULATING
Information
Patent Grant
Transmission device and method for measuring optical transmission c...
Patent number
10,230,463
Issue date
Mar 12, 2019
Fujitsu Limited
Guoxiu Huang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus and method for estimating optical transmission performance
Patent number
10,158,422
Issue date
Dec 18, 2018
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitting device, optical communication system and optic...
Patent number
10,009,113
Issue date
Jun 26, 2018
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical level control apparatus and optical reception apparatus
Patent number
10,003,406
Issue date
Jun 19, 2018
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Device and method for monitoring transmission characteristics
Patent number
9,887,774
Issue date
Feb 6, 2018
Fujitsu Limited
Guoxiu Huang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver and superimposed signal detecting method
Patent number
9,838,148
Issue date
Dec 5, 2017
Fujitsu Limited
Goji Nakagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication device and wavelength adjustment method
Patent number
9,705,604
Issue date
Jul 11, 2017
Fujitsu Limited
Kyosuke Sone
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver that has function to detect signal superimposed on...
Patent number
9,698,929
Issue date
Jul 4, 2017
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification device
Patent number
9,680,288
Issue date
Jun 13, 2017
Fujitsu Limited
Susumu Kinoshita
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplification device and optical amplification method
Patent number
9,343,872
Issue date
May 17, 2016
Fujitsu Limited
Setsuo Yoshida
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplification device and optical amplification method
Patent number
9,258,062
Issue date
Feb 9, 2016
Fujitsu Limited
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus
Patent number
9,019,593
Issue date
Apr 28, 2015
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical apparatus and use method thereof for passive optical networ...
Patent number
8,977,131
Issue date
Mar 10, 2015
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Level control circuit, level control method, and level control system
Patent number
8,937,762
Issue date
Jan 20, 2015
Fujitsu Limited
Yutaka Kai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical output level control apparatus
Patent number
8,824,043
Issue date
Sep 2, 2014
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Semiconductor optical amplifier device
Patent number
8,749,878
Issue date
Jun 10, 2014
Fujitsu Limited
Setsuo Yoshida
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical-switch driver circuit, optical switch, and optical changeov...
Patent number
8,670,639
Issue date
Mar 11, 2014
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
DEVICE AND METHOD FOR ESTIMATING CHARACTERISTICS OF OPTICAL FIBER T...
Publication number
20230396332
Publication date
Dec 7, 2023
Fujitsu Limited
Motohiko ETO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
COMMUNICATION DEVICE THAT PERFORMS ENCRYPTED COMMUNICATION AND COMM...
Publication number
20220094525
Publication date
Mar 24, 2022
Fujitsu Limited
Shoichiro Oda
G06 - COMPUTING CALCULATING COUNTING
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
OPTICAL TRANSMISSION APPARATUS AND ESTIMATION METHOD
Publication number
20200259562
Publication date
Aug 13, 2020
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE THAT PERFORMS ENCRYPTED COMMUNICATION AND COMM...
Publication number
20200036518
Publication date
Jan 30, 2020
Fujitsu Limited
Shoichiro Oda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
OPTICAL TRANSMISSION APPARATUS, OPTICAL TRANSMISSION SYSTEM, AND OP...
Publication number
20190165865
Publication date
May 30, 2019
Fujitsu Limited
GOJI NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DEVICE AND METHOD FOR MEASURING OPTICAL SIGNAL-TO-NOISE RATIO
Publication number
20180337727
Publication date
Nov 22, 2018
Fujitsu Limited
Setsuo Yoshida
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
TRANSMITTER, RECEIVER, AND TRANSMISSION METHOD
Publication number
20180234283
Publication date
Aug 16, 2018
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION APPARATUS, TRANSMISSION SYSTEM AND DATA DETECTION METHOD
Publication number
20180074539
Publication date
Mar 15, 2018
Fujitsu Limited
GOJI NAKAGAWA
G02 - OPTICS
Information
Patent Application
APPARATUS AND METHOD FOR ESTIMATING OPTICAL TRANSMISSION PERFORMANCE
Publication number
20170310391
Publication date
Oct 26, 2017
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DEVICE AND METHOD FOR MONITORING TRANSMISSION CHARACTERISTICS
Publication number
20170279528
Publication date
Sep 28, 2017
Fujitsu Limited
GUOXIU HUANG
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL-TO-NOISE RATIO MEASURING DEVICE AND OPTICAL SIGNAL-T...
Publication number
20170230112
Publication date
Aug 10, 2017
Fujitsu Limited
Shoichiro Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING DEVICE, OPTICAL COMMUNICATION SYSTEM AND OPTIC...
Publication number
20170222723
Publication date
Aug 3, 2017
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION SYSTEM
Publication number
20170155981
Publication date
Jun 1, 2017
Fujitsu Limited
GOJI NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION DEVICE AND METHOD FOR MEASURING OPTICAL TRANSMISSION C...
Publication number
20170047993
Publication date
Feb 16, 2017
Fujitsu Limited
GUOXIU HUANG
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER AND SUPERIMPOSED SIGNAL DETECTING METHOD
Publication number
20160337070
Publication date
Nov 17, 2016
Fujitsu Limited
GOJI NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE AND WAVELENGTH ADJUSTMENT METHOD
Publication number
20160294479
Publication date
Oct 6, 2016
Fujitsu Limited
Kyosuke Sone
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER THAT HAS FUNCTION TO DETECT SIGNAL SUPERIMPOSED ON...
Publication number
20160277139
Publication date
Sep 22, 2016
Fujitsu Limited
Setsuo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE
Publication number
20160149378
Publication date
May 26, 2016
Fujitsu Limited
Susumu KINOSHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD
Publication number
20150280398
Publication date
Oct 1, 2015
Fujitsu Limited
Setsuo YOSHIDA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL LEVEL CONTROL APPARATUS AND OPTICAL RECEPTION APPARATUS
Publication number
20150117871
Publication date
Apr 30, 2015
Fujitsu Limited
Setsuo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD
Publication number
20140139909
Publication date
May 22, 2014
Fujitsu Limited
Susumu KINOSHITA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL OUTPUT LEVEL CONTROL APPARATUS
Publication number
20140078579
Publication date
Mar 20, 2014
Fujitsu Limited
Setsuo YOSHIDA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
LEVEL CONTROL CIRCUIT, LEVEL CONTROL METHOD, AND LEVEL CONTROL SYSTEM
Publication number
20120293228
Publication date
Nov 22, 2012
Fujitsu Limited
Yutaka KAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION APPARATUS
Publication number
20120257272
Publication date
Oct 11, 2012
Fujitsu Limited
Setsuo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL-SWITCH DRIVER CIRCUIT, OPTICAL SWITCH, AND OPTICAL CHANGEOV...
Publication number
20120121219
Publication date
May 17, 2012
Fujitsu Limited
Setsuo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE