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Keiichi MATSUMOTO
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical amplification device, optical transmission system, and opti...
Patent number
11,881,675
Issue date
Jan 23, 2024
NEC Corporation
Hitoshi Takeshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier, control method for optical amplifier, and optica...
Patent number
11,876,339
Issue date
Jan 16, 2024
NEC Corporation
Keiichi Matsumoto
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical fiber amplifier, optical fiber amplifier control method, an...
Patent number
11,870,208
Issue date
Jan 9, 2024
NEC Corporation
Keiichi Matsumoto
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light amplification device, light transmission system, and light am...
Patent number
11,683,116
Issue date
Jun 20, 2023
NEC Corporation
Keiichi Matsumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifying apparatus and method of amplifying optical signal
Patent number
11,374,377
Issue date
Jun 28, 2022
NEC Corporation
Emmanuel Le Taillandier De Gabory
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier and control method therefor
Patent number
11,329,444
Issue date
May 10, 2022
NEC Corporation
Emmanuel Le Taillandier de Gabory
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND OPTI...
Publication number
20240097397
Publication date
Mar 21, 2024
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER, OPTICAL AMPLIFIER CONTROLLING METHOD, AND OPTICA...
Publication number
20230412297
Publication date
Dec 21, 2023
NEC Corporation
Keiichi MATSUMOTO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, AND OPTICAL TRANSMISSION METHOD
Publication number
20230327767
Publication date
Oct 12, 2023
NEC Corporation
Hitoshi Takeshita
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD
Publication number
20230163552
Publication date
May 25, 2023
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
MONITORING DEVICE, MONITORING METHOD, OPTICAL AMPLIFIER, AND OPTICA...
Publication number
20230047836
Publication date
Feb 16, 2023
NEC Corporation
Keiichi Matsumoto
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
MONITORING DEVICE, MONITORING METHOD, AND OPTICAL TRANSMISSION SYSTEM
Publication number
20230026901
Publication date
Jan 26, 2023
NEC Corporation
Keiichi MATSUMOTO
G02 - OPTICS
Information
Patent Application
LIGHT AMPLIFICATION DEVICE, LIGHT TRANSMISSION SYSTEM, AND LIGHT AM...
Publication number
20220385026
Publication date
Dec 1, 2022
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
LIGHT AMPLIFICATION DEVICE, LIGHT TRANSMISSION SYSTEM, AND LIGHT AM...
Publication number
20220376811
Publication date
Nov 24, 2022
NEC Corporation
Keiichi MATSUMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND OPTI...
Publication number
20220166179
Publication date
May 26, 2022
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER, OPTICAL AMPLIFIER EQUALIZING METHOD, AND TRANSMI...
Publication number
20220045473
Publication date
Feb 10, 2022
NEC Corporation
Keiichi MATSUMOTO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFICATION APPARATUS AND OPTICAL AMPLIFICATION METHOD
Publication number
20210399514
Publication date
Dec 23, 2021
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFYING APPARATUS AND METHOD OF AMPLIFYING OPTICAL SIGNAL
Publication number
20210194218
Publication date
Jun 24, 2021
NEC Corporation
Emmanuel LE TAILLANDIER DE GABORY
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER AND OPTICAL AMPLIFICATION METHOD
Publication number
20210057869
Publication date
Feb 25, 2021
NEC Corporation
Hitoshi TAKESHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER, CONTROL METHOD FOR OPTICAL AMPLIFIER, AND OPTICA...
Publication number
20210057871
Publication date
Feb 25, 2021
NEC Corporation
Keiichi MATSUMOTO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
MONITORING APPARATUS FOR OPTICAL AMPLIFIER, OPTICAL AMPLIFYING SYST...
Publication number
20210044077
Publication date
Feb 11, 2021
NEC Corporation
Emmanuel LE TAILLANDIER DE GABORY
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER, OPTICAL COMMUNICATION SYSTEM AND OPTICAL AMPLIFI...
Publication number
20210028590
Publication date
Jan 28, 2021
NEC Corporation
Emmanuel LE TAILLANDIER DE GABORY
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL FIBER AMPLIFIER, OPTICAL FIBER AMPLIFIER CONTROL METHOD, AN...
Publication number
20200412079
Publication date
Dec 31, 2020
NEC Corporation
Keiichi MATSUMOTO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER AND CONTROL METHOD THEREFOR
Publication number
20190221987
Publication date
Jul 18, 2019
NEC Corporation
Emmanuel LE TAILLANDIER DE GABORY
G02 - OPTICS