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Mingxi Huang

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Patents Grantslast 30 patents

  • 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

    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

Patents Applicationslast 30 patents

  • 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

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

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