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Wataru Imajuku
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Yokohama-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical amplification system and optical amplification method
Patent number
11,108,208
Issue date
Aug 31, 2021
Nippon Telegraph and Telephone Corporation
Takuya Oda
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Transmission quality estimation system, transmission quality estima...
Patent number
10,686,520
Issue date
Jun 16, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission quality estimation system, transmission quality estima...
Patent number
10,637,568
Issue date
Apr 28, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
Information
Patent Grant
Communication system and fault detection method
Patent number
10,615,868
Issue date
Apr 7, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
Information
Patent Grant
Communication system and connector
Patent number
10,527,781
Issue date
Jan 7, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Communication system and fault location specifying method
Patent number
10,511,381
Issue date
Dec 17, 2019
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
Information
Patent Grant
Device and method for correcting a path trouble in a communication...
Patent number
8,134,920
Issue date
Mar 13, 2012
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Upper layer node, lower layer node, and node control method
Patent number
7,333,424
Issue date
Feb 19, 2008
Nippon Telegraph and Telephone Corporation
Naoaki Yamanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Node used in photonic network, and photonic network
Patent number
7,313,328
Issue date
Dec 25, 2007
Nippon Telegraph and Telephone Corporation
Eiji Oki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Node, an optical/electrical path integrated network using the node,...
Patent number
7,313,094
Issue date
Dec 25, 2007
Nippon Telegraph and Telephone Corporation
Eiji Oki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical path communication network, node, and optical path setup me...
Patent number
7,289,730
Issue date
Oct 30, 2007
Nippon Telegraph and Telephone Corporation
Nobuaki Matsuura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for controlling optical wavelength based on optic...
Patent number
7,023,887
Issue date
Apr 4, 2006
Nippon Telegraph and Telephone Corp.
Wataru Imajuku
G01 - MEASURING TESTING
Information
Patent Grant
Optical parametric circuit
Patent number
7,012,740
Issue date
Mar 14, 2006
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
G02 - OPTICS
Information
Patent Grant
Method and apparatus for controlling optical wavelength based on op...
Patent number
6,909,732
Issue date
Jun 21, 2005
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
G01 - MEASURING TESTING
Information
Patent Grant
Optical parametric circuit
Patent number
6,867,903
Issue date
Mar 15, 2005
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
G02 - OPTICS
Information
Patent Grant
Bit-phase synchronized optical pulse stream local generator
Patent number
6,560,007
Issue date
May 6, 2003
Nippon Telegraph and Telephone Corporation
Kentaro Uchiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for controlling optical wavelength based on op...
Patent number
6,370,169
Issue date
Apr 9, 2002
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
G01 - MEASURING TESTING
Patents Applications
last 30 patents
Information
Patent Application
COMMUNICATION SYSTEM AND CONNECTOR
Publication number
20180375579
Publication date
Dec 27, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION SYSTEM AND OPTICAL AMPLIFICATION METHOD
Publication number
20180358773
Publication date
Dec 13, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM AND FAULT DETECTION METHOD
Publication number
20180359024
Publication date
Dec 13, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM AND FAULT LOCATION SPECIFYING METHOD
Publication number
20180351639
Publication date
Dec 6, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
NODE AND OPTICAL POWER SUPPLY SYSTEM
Publication number
20180343067
Publication date
Nov 29, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM AND CONNECTOR
Publication number
20180341060
Publication date
Nov 29, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION QUALITY ESTIMATION SYSTEM, TRANSMISSION QUALITY ESTIMA...
Publication number
20180337726
Publication date
Nov 22, 2018
Nippon Telegraph and Telephone Corporation
Takuya ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Device and method for correcting a path trouble in a communication...
Publication number
20060256712
Publication date
Nov 16, 2006
Nippon Telegraph and Telephone Corporation
Wataru Imajuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method and system for controlling optical wavelength based on optic...
Publication number
20050157969
Publication date
Jul 21, 2005
Wataru Imajuku
G01 - MEASURING TESTING
Information
Patent Application
Optical parametric circuit
Publication number
20050094249
Publication date
May 5, 2005
Wataru Imajuku
G02 - OPTICS
Information
Patent Application
Optical path communication network, node, and optical path setup me...
Publication number
20030198227
Publication date
Oct 23, 2003
Nobuaki Matsuura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Upper layer node, lower layer node, and node control method
Publication number
20030169684
Publication date
Sep 11, 2003
Naoaki Yamanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Node used in photonic network, and photonic network
Publication number
20030161633
Publication date
Aug 28, 2003
Eiji Oki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Node, an optical/electrical path integrated network using the node,...
Publication number
20030156536
Publication date
Aug 21, 2003
Eiji Oki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical network, optical cross-connect apparatus, photonic-IP netwo...
Publication number
20030147645
Publication date
Aug 7, 2003
Wataru Imajuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method and apparatus for controlling optical wavelength based on op...
Publication number
20020088920
Publication date
Jul 11, 2002
Wataru Imajuku
G01 - MEASURING TESTING
Information
Patent Application
Bit-phase synchronized optical pulse stream local generator
Publication number
20020027692
Publication date
Mar 7, 2002
Nippon Telegraph and Telephone Corporation
Kentaro Uchiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical parametric circuit
Publication number
20010031110
Publication date
Oct 18, 2001
Wataru Imajuku
G02 - OPTICS
Information
Patent Application
Ultra-highspeed packet transfer ring network
Publication number
20010017866
Publication date
Aug 30, 2001
Atsushi Takada
H04 - ELECTRIC COMMUNICATION TECHNIQUE