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Motoyoshi Kawai
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Spectrum monitoring apparatus, submarine apparatus, and optical com...
Patent number
11,936,422
Issue date
Mar 19, 2024
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical repeater and optical signal relay method
Patent number
11,405,110
Issue date
Aug 2, 2022
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical multiplexing and demultiplexing device, and method of contr...
Patent number
10,349,153
Issue date
Jul 9, 2019
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication device, optical communication system, and opt...
Patent number
10,200,117
Issue date
Feb 5, 2019
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and control method thereof
Patent number
9,496,676
Issue date
Nov 15, 2016
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Repeater, excitation light supply device used for the same, and exc...
Patent number
9,444,219
Issue date
Sep 13, 2016
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical semiconductor module
Patent number
6,967,980
Issue date
Nov 22, 2005
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Two-way combination optical system unit
Patent number
6,597,484
Issue date
Jul 22, 2003
NEC Corporation
Motoyoshi Kawai
G02 - OPTICS
Information
Patent Grant
Optical system unit for optical transceiver
Patent number
6,453,091
Issue date
Sep 17, 2002
NEC Corporation
Motoyoshi Kawai
G02 - OPTICS
Information
Patent Grant
Photosemiconductor device mounted structure
Patent number
6,184,560
Issue date
Feb 6, 2001
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
GAIN EQUALIZATION APPARATUS AND METHOD FOR EQUALIZING GAIN
Publication number
20240171282
Publication date
May 23, 2024
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT CONTROL DEVICE, METHOD FOR CONTROLLING LIGHT CONTROL DEVICE,...
Publication number
20240154692
Publication date
May 9, 2024
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT SUPPLY APPARATUS
Publication number
20240055823
Publication date
Feb 15, 2024
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
SPECTRUM MONITORING APPARATUS, SUBMARINE APPARATUS, AND OPTICAL COM...
Publication number
20230096208
Publication date
Mar 30, 2023
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MONITORING SIGNAL LIGHT OUTPUT APPARATUS, SUBMARINE APPARATUS, AND...
Publication number
20230076588
Publication date
Mar 9, 2023
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL ADD/DROP MULTIPLEXER AND OPTICAL TRANSMISSION METHOD
Publication number
20220140907
Publication date
May 5, 2022
NEC CORPORATION
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL REPEATER AND OPTICAL SIGNAL RELAY METHOD
Publication number
20210384978
Publication date
Dec 9, 2021
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION DEVICE, AND DEVICE SUPPLYING EXCITATION LIGHT...
Publication number
20190348812
Publication date
Nov 14, 2019
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD
Publication number
20190342027
Publication date
Nov 7, 2019
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical Multiplexing and Demultiplexing Device, and Method of Contr...
Publication number
20180070156
Publication date
Mar 8, 2018
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION DEVICE, OPTICAL COMMUNICATION SYSTEM, AND OPT...
Publication number
20170230109
Publication date
Aug 10, 2017
NEC Corporation
Motoyoshi Kawai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER AND CONTROL METHOD THEREOF
Publication number
20160028209
Publication date
Jan 28, 2016
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
REPEATER, EXCITATION LIGHT SUPPLY DEVICE USED FOR THE SAME, AND EXC...
Publication number
20150048238
Publication date
Feb 19, 2015
NEC Corporation
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL MODULE
Publication number
20080240647
Publication date
Oct 2, 2008
Motoyoshi Kawai
G02 - OPTICS
Information
Patent Application
LIGHT-RECEIVING ELEMENT AND LIGHT-RECEIVING DEVICE COMPRISING THE SAME
Publication number
20080075474
Publication date
Mar 27, 2008
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical semiconductor module
Publication number
20020150134
Publication date
Oct 17, 2002
Motoyoshi Kawai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Light receiving device
Publication number
20020118917
Publication date
Aug 29, 2002
Motoyoshi Kawai
G02 - OPTICS
Information
Patent Application
Optical system unit for optical transceiver
Publication number
20010000316
Publication date
Apr 19, 2001
Motoyoshi Kawai
G02 - OPTICS