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Vacuum loss detection
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Patent number 9,870,885
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Issue date Jan 16, 2018
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Cooper Technologies Company
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John Albert Kovacich
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum monitoring device
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Patent number 9,646,785
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Issue date May 9, 2017
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Mitsubishi Electric Corporation
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Naoaki Inoue
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Tank-type circuit breaker
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Patent number 9,190,232
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Issue date Nov 17, 2015
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Mitsubishi Electric Corporation
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Junichi Abe
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Vacuum insulated switchgear
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Patent number 8,373,082
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Issue date Feb 12, 2013
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Hitachi, Ltd.
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Kenji Tsuchiya
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Vacuum insulated switchgear
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Patent number 8,304,679
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Issue date Nov 6, 2012
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Hitachi, Ltd.
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Kenji Tsuchiya
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Vacuum insulated switchgear
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Patent number 7,902,480
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Issue date Mar 8, 2011
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Hitachi, Ltd.
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Kenji Tsuchiya
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Vacuum insulated switchgear
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Patent number 7,790,998
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Issue date Sep 7, 2010
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Hitachi, Ltd.
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Kenji Tsuchiya
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Vacuum Switchgear
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Patent number 7,223,932
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Issue date May 29, 2007
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Hitachi, Ltd.
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Masato Kobayashi
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum switchgear
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Patent number 7,135,652
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Issue date Nov 14, 2006
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Hitachi, Ltd.
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Masato Kobayashi
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum switch
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Patent number 6,951,993
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Issue date Oct 4, 2005
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Hitachi, Ltd.
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Shuuichi Kikukawa
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum switchgear
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Patent number 6,881,917
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Issue date Apr 19, 2005
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Hitachi, Ltd.
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Shuuichi Kikukawa
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum switch
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Patent number 6,855,903
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Issue date Feb 15, 2005
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Hitachi, Ltd.
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Shuuichi Kikukawa
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H01 - BASIC ELECTRIC ELEMENTS