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Masayuki HIROTA

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Patents Grantslast 30 patents

  • Information Patent Grant

    Power transducer
    • Patent number 8,848,384
    • Issue date Sep 30, 2014
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi Ibori
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Temperature detection method of semiconductor device and power conv...
    • Patent number 8,423,317
    • Issue date Apr 16, 2013
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Tomoya Kamezawa
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Power transducer
    • Patent number 8,385,078
    • Issue date Feb 26, 2013
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi Ibori
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Electric power conversion system
    • Patent number 8,159,820
    • Issue date Apr 17, 2012
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi Ibori
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Power conversion apparatus and method of estimating power cycle life
    • Patent number 7,904,254
    • Issue date Mar 8, 2011
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi Ibori
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Filter apparatus and frequency converter to which the filter appara...
    • Patent number 7,643,304
    • Issue date Jan 5, 2010
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    AC/DC/AC converter with reduced inductance in the DC filter capacitors
    • Patent number 7,518,890
    • Issue date Apr 14, 2009
    • Hitachi, Ltd.
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Electric power converter
    • Patent number 7,515,422
    • Issue date Apr 7, 2009
    • Hitachi Industrial Equipment System Co.
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Switching power supply circuit and frequency converter
    • Patent number 7,394,668
    • Issue date Jul 1, 2008
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Tooru Nakajima
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Frequency converter
    • Patent number 7,272,004
    • Issue date Sep 18, 2007
    • Hitachi Industrial Equipment Systems Co. Ltd.
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Electric circuit module
    • Patent number 7,206,204
    • Issue date Apr 17, 2007
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Kinya Nakatsu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Switching power supply circuit and frequency converter
    • Patent number 7,151,680
    • Issue date Dec 19, 2006
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Tooru Nakajima
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Frequency converter
    • Patent number 7,054,157
    • Issue date May 30, 2006
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Power converter
    • Patent number 6,927,665
    • Issue date Aug 9, 2005
    • Hitachi, Ltd.
    • Kinya Nakatsu
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Power converter
    • Patent number 6,873,240
    • Issue date Mar 29, 2005
    • Hitachi, Ltd.
    • Kinya Nakatsu
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

  • Information Patent Application

    POWER TRANSDUCER
    • Publication number 20130100632
    • Publication date Apr 25, 2013
    • HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    • Satoshi IBORI
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    POWER TRANSDUCER
    • Publication number 20100079956
    • Publication date Apr 1, 2010
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi IBORI
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
    • Publication number 20090046434
    • Publication date Feb 19, 2009
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
    • Publication number 20090046435
    • Publication date Feb 19, 2009
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
    • Publication number 20090040733
    • Publication date Feb 12, 2009
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    FILTER APPARATUS AND FREQUENCY COVERTER TO WHICH THE FILTER APPARAT...
    • Publication number 20090040743
    • Publication date Feb 12, 2009
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Electric power conversion system
    • Publication number 20090034309
    • Publication date Feb 5, 2009
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Satoshi Ibori
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    POWER CONVERSION APPARATUS AND METHOD OF ESTIMATING POWER CYCLE LIFE
    • Publication number 20080262750
    • Publication date Oct 23, 2008
    • Satoshi Ibori
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Frequency Converter
    • Publication number 20080212279
    • Publication date Sep 4, 2008
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Electric power converter
    • Publication number 20070279864
    • Publication date Dec 6, 2007
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Frequency converter
    • Publication number 20070091652
    • Publication date Apr 26, 2007
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Switching power supply circuit and frequency converter
    • Publication number 20070058400
    • Publication date Mar 15, 2007
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Tetsuya Kimura
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Frequency converter
    • Publication number 20060181847
    • Publication date Aug 17, 2006
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Temperature detection method of semiconductor device and power conv...
    • Publication number 20050197799
    • Publication date Sep 8, 2005
    • Tomoya Kamezawa
    • G01 - MEASURING TESTING
  • Information Patent Application

    Electric circuit module
    • Publication number 20050135065
    • Publication date Jun 23, 2005
    • HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    • Kinya Nakatsu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Filter apparatus and frequency converter to which the filter appara...
    • Publication number 20050126811
    • Publication date Jun 16, 2005
    • Masayuki Hirota
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Power converter
    • Publication number 20050052271
    • Publication date Mar 10, 2005
    • HITACH LTD.
    • Kinya Nakatsu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Frequency converter
    • Publication number 20050030715
    • Publication date Feb 10, 2005
    • Masayuki Hirota
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Switching power supply circuit and frequency converter
    • Publication number 20040066661
    • Publication date Apr 8, 2004
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Tooru Nakajima
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Power converter
    • Publication number 20030038699
    • Publication date Feb 27, 2003
    • Kinya Nakatsu
    • H01 - BASIC ELECTRIC ELEMENTS