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Patents Grants
last 30 patents
Information
Patent Grant
Optical receiver
Patent number
12,021,568
Issue date
Jun 25, 2024
Fujitsu Limited
Yusuke Shigeta
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, communication apparatus, and method of control...
Patent number
11,888,526
Issue date
Jan 30, 2024
Fujitsu Limited
Shoichi Murakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical apparatus and optical receiving method
Patent number
11,223,385
Issue date
Jan 11, 2022
Fujitsu Limited
Shoichi Murakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network system, management device, and network design method
Patent number
11,196,485
Issue date
Dec 7, 2021
Fujitsu Limited
Taizo Maeda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication apparatus, server apparatus, and optical tran...
Patent number
10,715,363
Issue date
Jul 14, 2020
Fujitsu Limited
Naoya Okada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter
Patent number
10,491,307
Issue date
Nov 26, 2019
Fujitsu Limited
Shuzo Matsushita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus, optical power monitor, and method o...
Patent number
10,020,879
Issue date
Jul 10, 2018
Fujitsu Limited
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus, optical transmission system, and po...
Patent number
9,882,647
Issue date
Jan 30, 2018
Fujitsu Limited
Taketo Endo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus and method for controlling optical p...
Patent number
9,722,704
Issue date
Aug 1, 2017
Fujitsu Limited
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical transmission apparatus and wav...
Patent number
9,698,905
Issue date
Jul 4, 2017
Fujitsu Limited
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission device and optical transmission method
Patent number
9,531,496
Issue date
Dec 27, 2016
Fujitsu Limited
Masahiro Yuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmitting device, communication system, and method for transmiss...
Patent number
9,438,343
Issue date
Sep 6, 2016
Fujitsu Limited
Norifumi Shukunami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission device
Patent number
9,432,113
Issue date
Aug 30, 2016
Fujitsu Limited
Hiroki Oi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission apparatus, transmission system, and method of controll...
Patent number
9,300,426
Issue date
Mar 29, 2016
Fujitsu Limited
Yoshinobu Matsukawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, optical receiver, and optical transmission method
Patent number
9,148,229
Issue date
Sep 29, 2015
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical node and optical communication method
Patent number
9,014,569
Issue date
Apr 21, 2015
Fujitsu Limited
Koji Biwa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent optical receiver, adaptive equalizer, and digital...
Patent number
8,989,602
Issue date
Mar 24, 2015
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Raman amplifier
Patent number
8,879,145
Issue date
Nov 4, 2014
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent receiver and phase control method
Patent number
8,873,973
Issue date
Oct 28, 2014
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and transmission system
Patent number
8,854,727
Issue date
Oct 7, 2014
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver, method for receiving optical signal, and optical...
Patent number
8,824,902
Issue date
Sep 2, 2014
Fujitsu Limited
Takeshi Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Adaptive equalizer, optical receiver, and tap coefficient correctin...
Patent number
8,693,898
Issue date
Apr 8, 2014
Fujitsu Limited
Nobukazu Koizumi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent receiver and digital coherent reception method
Patent number
8,670,678
Issue date
Mar 11, 2014
Fujitsu Limited
Yuichirou Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent receiver and receiving method
Patent number
8,660,438
Issue date
Feb 25, 2014
Fujitsu Limited
Hisao Nakashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical node, optical network system, and method for measuring pola...
Patent number
8,655,185
Issue date
Feb 18, 2014
Fujitsu Limited
Takeshi Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital coherent receiver and receiving method
Patent number
8,630,552
Issue date
Jan 14, 2014
Fujitsu Limited
Hisao Nakashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver
Patent number
8,478,137
Issue date
Jul 2, 2013
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication device
Patent number
8,358,939
Issue date
Jan 22, 2013
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
WDM optical transmission system and optical amplifying apparatus
Patent number
7,899,331
Issue date
Mar 1, 2011
Fujitsu Limited
Hiroyuki Itoh
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and abnormality detection method for the same
Patent number
7,880,960
Issue date
Feb 1, 2011
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMITTER AND BIAS CONTROL METHOD
Publication number
20240120996
Publication date
Apr 11, 2024
Fujitsu Limited
Hideyuki MATSUURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER
Publication number
20230224045
Publication date
Jul 13, 2023
Fujitsu Limited
Yusuke SHIGETA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, COMMUNICATION APPARATUS, AND METHOD OF CONTROL...
Publication number
20230080354
Publication date
Mar 16, 2023
Fujitsu Limited
Shoichi Murakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL APPARATUS AND OPTICAL RECEIVING METHOD
Publication number
20210409124
Publication date
Dec 30, 2021
Fujitsu Limited
Shoichi Murakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
NETWORK SYSTEM, MANAGEMENT DEVICE, AND NETWORK DESIGN METHOD
Publication number
20210075506
Publication date
Mar 11, 2021
Fujitsu Limited
Taizo MAEDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS, SERVER APPARATUS, OPTICAL TRANSPOR...
Publication number
20200213009
Publication date
Jul 2, 2020
Fujitsu Limited
Naoya OKADA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER
Publication number
20170331559
Publication date
Nov 16, 2017
Fujitsu Limited
Shuzo Matsushita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION APPARATUS, OPTICAL POWER MONITOR, AND METHOD O...
Publication number
20170126315
Publication date
May 4, 2017
Fujitsu Limited
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION APPARATUS AND METHOD FOR CONTROLLING OPTICAL P...
Publication number
20160248513
Publication date
Aug 25, 2016
Fujitsu Limited
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION APPARATUS, OPTICAL TRANSMISSION SYSTEM, AND PO...
Publication number
20160241341
Publication date
Aug 18, 2016
Fujitsu Limited
Taketo Endo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND WAV...
Publication number
20150381276
Publication date
Dec 31, 2015
FUJITSU LIMITED
Taku Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD
Publication number
20150132009
Publication date
May 14, 2015
FUJITSU LIMITED
Masahiro Yuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE
Publication number
20150098696
Publication date
Apr 9, 2015
Fujitsu Limited
Hiroki OI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION APPARATUS, TRANSMISSION SYSTEM, AND METHOD OF CONTROLL...
Publication number
20140294378
Publication date
Oct 2, 2014
Fujitsu Limited
Yoshinobu Matsukawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
RAMAN AMPLIFIER
Publication number
20140146385
Publication date
May 29, 2014
FUJITSU TELECOM NETWORKS LIMITED
Tomoaki TAKEYAMA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER AND TRANSMISSION SYSTEM
Publication number
20140139906
Publication date
May 22, 2014
Fujitsu Limited
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
TRANSMITTING DEVICE, COMMUNICATION SYSTEM, AND METHOD FOR TRANSMISS...
Publication number
20140079385
Publication date
Mar 20, 2014
Fujitsu Limited
Norifumi SHUKUNAMI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL RECEIVER, AND OPTICAL TRANSMISSION METHOD
Publication number
20130259478
Publication date
Oct 3, 2013
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL COHERENT RECEIVER AND PHASE CONTROL METHOD
Publication number
20120308227
Publication date
Dec 6, 2012
Fujitsu Limited
Kosuke KOMAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL COHERENT OPTICAL RECEIVER, ADAPTIVE EQUALIZER, AND DIGITAL...
Publication number
20120148266
Publication date
Jun 14, 2012
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Adaptive equalizer, optical receiver, and tap coefficient correctin...
Publication number
20120134684
Publication date
May 31, 2012
FUJITSU LIMITED
Nobukazu Koizumi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL NODE AND OPTICAL COMMUNICATION METHOD
Publication number
20120087669
Publication date
Apr 12, 2012
Fujitsu Limited
Koji BIWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER, METHOD FOR RECEIVING OPTICAL SIGNAL, AND OPTICAL...
Publication number
20120051754
Publication date
Mar 1, 2012
FUJITSU LIMITED
Takeshi SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL COHERENT RECEIVER AND RECEIVING METHOD
Publication number
20110255877
Publication date
Oct 20, 2011
Fujitsu Limited
Hisao NAKASHIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL COHERENT RECEIVER AND DIGITAL COHERENT RECEPTION METHOD
Publication number
20110229127
Publication date
Sep 22, 2011
FUJITSU LIMITED
Yuichirou SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL NODE, OPTICAL NETWORK SYSTEM, AND METHOD FOR MEASURING POLA...
Publication number
20110229128
Publication date
Sep 22, 2011
Fujitsu Limited
Takeshi SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER
Publication number
20110200339
Publication date
Aug 18, 2011
Fujitsu Limited
Kosuke KOMAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION DEVICE
Publication number
20110026940
Publication date
Feb 3, 2011
Fujitsu Limited
Kosuke Komaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER AND ABNORMALITY DETECTION METHOD FOR THE SAME
Publication number
20090257115
Publication date
Oct 15, 2009
FUJITSU LIMITED
Kosuke KOMAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WDM optical transimission system and optical amplifying apparatus
Publication number
20080080867
Publication date
Apr 3, 2008
FUJITSU LIMITED
Hiroyuki Itoh
H04 - ELECTRIC COMMUNICATION TECHNIQUE