TREA

Hiroaki Hamaguchi

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  • Nagoya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electromagnetic relay assembly
    • Patent number 5,886,601
    • Issue date Mar 23, 1999
    • Matsushita Electric Works, Ltd.
    • Nobuhiro Kitamura
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Welding free relay contact device
    • Patent number 5,049,845
    • Issue date Sep 17, 1991
    • Matsushita Electric Works, Ltd.
    • Yoichi Yokoyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Polarized electromagnet
    • Patent number 4,855,701
    • Issue date Aug 8, 1989
    • Electric Power Research Institute, Inc.
    • Yoichi Yokoyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Remotely controllable relay
    • Patent number 4,703,294
    • Issue date Oct 27, 1987
    • Matsushita Electric Works, Ltd.
    • Yoichi Yokoyama
    • H01 - BASIC ELECTRIC ELEMENTS