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Makoto Hagiwara

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  • Tochigi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Chopper circuit
    • Patent number 11,888,396
    • Issue date Jan 30, 2024
    • Tokyo Institute of Technology
    • Makoto Hagiwara
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Bidirectional chopper circuit
    • Patent number 10,498,233
    • Issue date Dec 3, 2019
    • Tokyo Institute of Technology
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Power converter
    • Patent number 10,103,645
    • Issue date Oct 16, 2018
    • Tokyo Institute of Technology
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Single-phase power converter, three-phase two-phase power converter...
    • Patent number 9,496,805
    • Issue date Nov 15, 2016
    • Tokyo Institute of Technology
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Power converter and method for controlling same
    • Patent number 9,379,632
    • Issue date Jun 28, 2016
    • Tokyo Institute of Technology
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Differential gear unit
    • Patent number 5,616,096
    • Issue date Apr 1, 1997
    • Viscodrive Japan Ltd.
    • Makoto Hagiwara
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Viscous coupling
    • Patent number 5,161,658
    • Issue date Nov 10, 1992
    • Viscodrive Japan Kabushiki Kaisha
    • Makoto Hagiwara
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Power delivering apparatus
    • Patent number 5,145,470
    • Issue date Sep 8, 1992
    • Viscodrive Japan Kabushiki Kaisha
    • Makoto Hagiwara
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Viscous coupling
    • Patent number 5,080,210
    • Issue date Jan 14, 1992
    • Viscodrive Japan Kabushiki Kaisha
    • Makoto Hagiwara
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Locking differential gear assembly
    • Patent number 4,805,486
    • Issue date Feb 21, 1989
    • Tochigifujisangyo Kabushiki Kaisha
    • Makoto Hagiwara
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Power transmission device
    • Patent number 4,735,108
    • Issue date Apr 5, 1988
    • Tochigifujisangyo Kabushikigaisha
    • Masao Teraoka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    CHOPPER CIRCUIT
    • Publication number 20210351699
    • Publication date Nov 11, 2021
    • TOKYO INSTITUTE OF TECHNOLOGY
    • MAKOTO HAGIWARA
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    ASSEMBLY STRUCTURE OF SENSOR, ELECTRIC MOTOR, AND ELECTRIC POWER ST...
    • Publication number 20190248406
    • Publication date Aug 15, 2019
    • NSK Ltd.
    • Noboru KANEKO
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Application

    Bidirectional Chopper Circuit
    • Publication number 20180254699
    • Publication date Sep 6, 2018
    • TOKYO INSTITUTE OF TECHNOLOGY
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    POWER CONVERTER
    • Publication number 20170085193
    • Publication date Mar 23, 2017
    • TOKYO INSTITUTE OF TECHNOLOGY
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    POWER CONVERTER AND METHOD FOR CONTROLLING SAME
    • Publication number 20140103887
    • Publication date Apr 17, 2014
    • Hirofumi Akagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER