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Kouji Obata
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Hitachi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus and method for detecting partial discharge at turn-to-tur...
Patent number
8,816,694
Issue date
Aug 26, 2014
Hitachi Industrial Equipment Systems Co., Ltd.
Kouji Obata
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Frequency converter, motor, motor drive system and maintenance meth...
Patent number
7,663,337
Issue date
Feb 16, 2010
Hitachi Industrial Equipment System Co.
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Frequency converter, motor, motor drive system and maintenance meth...
Patent number
7,511,450
Issue date
Mar 31, 2009
Hitachi Industrial Equipment System Co., Ltd.
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Frequency converter, motor, motor drive system and maintenance meth...
Patent number
7,408,323
Issue date
Aug 5, 2008
Hitachi Industrial Equipment Systems Co., Ltd.
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Frequency converter, motor, motor drive system and maintenance meth...
Patent number
7,202,628
Issue date
Apr 10, 2007
Hitachi Industrial Equipment Systems Co., Ltd.
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Frequency converter, motor, motor drive system and maintenance meth...
Patent number
7,112,940
Issue date
Sep 26, 2006
Hitachi Industrial Equipment Systems Co.
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
APPARATUS AND METHOD FOR DETECTING PARTIAL DISCHARGE AT TURN-TO-TUR...
Publication number
20140354298
Publication date
Dec 4, 2014
Kouji Obata
G01 - MEASURING TESTING
Information
Patent Application
FREQUENCY CONVERTER, MOTOR, MOTOR DRIVE SYSTEM AND MAINTENANCE METH...
Publication number
20090121666
Publication date
May 14, 2009
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
FREQUENCY CONVERTER, MOTOR, MOTOR DRIVE SYSTEM AND MAINTENANCE METH...
Publication number
20080061730
Publication date
Mar 13, 2008
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Frequency converter, motor, motor drive system and maintenance meth...
Publication number
20070200530
Publication date
Aug 30, 2007
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Frequency converter, motor, motor drive system and maintenance meth...
Publication number
20070007928
Publication date
Jan 11, 2007
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Apparatus for partial discharge detection of turn to turn insulatio...
Publication number
20060022679
Publication date
Feb 2, 2006
Kouji Obata
G01 - MEASURING TESTING
Information
Patent Application
Frequency converter, motor, motor drive system and maintenance meth...
Publication number
20060001396
Publication date
Jan 5, 2006
Tadahiro Shimozono
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER