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Akira Atsumi

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  • Shimizu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Control method and apparatus for an air conditioner using a heat pump
    • Patent number 4,603,556
    • Issue date Aug 5, 1986
    • Hitachi, Ltd.
    • Kazutaka Suefuji
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Refrigeration system
    • Patent number 4,562,700
    • Issue date Jan 7, 1986
    • Hitachi, Ltd.
    • Akira Atsumi
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Refrigeration apparatus
    • Patent number 4,551,983
    • Issue date Nov 12, 1985
    • Hitachi, Ltd.
    • Akira Atsumi
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Refrigerating apparatus having a gas injection path
    • Patent number 4,517,811
    • Issue date May 21, 1985
    • Hitachi, Ltd.
    • Akira Atsumi
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Expansion valve
    • Patent number 4,500,035
    • Issue date Feb 19, 1985
    • Hitachi, Ltd.
    • Shigeaki Kuroda
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...