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Hidetoshi Aizawa

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  • Hitachi-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Power conversion apparatus
    • Patent number 6,490,182
    • Issue date Dec 3, 2002
    • Hitachi, Ltd.
    • Shuji Katoh
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Semiconductor power converting apparatus
    • Patent number 6,380,796
    • Issue date Apr 30, 2002
    • Hitachi, Ltd.
    • Hiromitsu Sakai
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Semiconductor power converting apparatus
    • Patent number 6,242,968
    • Issue date Jun 5, 2001
    • Hitachi, Ltd.
    • Hiromitsu Sakai
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Gate drive power source for electric power converter
    • Patent number 5,424,937
    • Issue date Jun 13, 1995
    • Hitachi, Ltd.
    • Ryuji Iyotani
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Pulse width modulation inverter
    • Patent number 4,455,599
    • Issue date Jun 19, 1984
    • Hitachi, Ltd.
    • Kaoru Tamura
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

  • Information Patent Application

    Power conversion apparatus
    • Publication number 20020131276
    • Publication date Sep 19, 2002
    • Hitachi, Ltd.
    • Shuji Katoh
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    Semiconductor power converting apparatus
    • Publication number 20010015670
    • Publication date Aug 23, 2001
    • Hitachi, Ltd.
    • Hiromitsu Sakai
    • H03 - BASIC ELECTRONIC CIRCUITRY