TREA

Naohiro Katayama

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vibrating compressor
    • Patent number 4,320,448
    • Issue date Mar 16, 1982
    • Sawafuji Electric Co., Ltd.
    • Yukio Okuda
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Refrigerating system
    • Patent number 4,179,899
    • Issue date Dec 25, 1979
    • Sawafuji Electric Co. Ltd.
    • Naohiro Katayama
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Direct current power supply device for battery charging
    • Patent number 4,147,970
    • Issue date Apr 3, 1979
    • Sawafuji Electric Co. Ltd.
    • Yukio Okuda
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER