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Ryuji Watanabe

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  • Oizumi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hermetically sealed electric motor compressor
    • Patent number 5,328,338
    • Issue date Jul 12, 1994
    • Sanyo Electric Co., Ltd.
    • Yutaka Hirano
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Method for manufacturing a piston
    • Patent number 4,918,806
    • Issue date Apr 24, 1990
    • Sanyo Electric Co., Ltd.
    • Ryuji Watanabe
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piston assembly for compressors
    • Patent number 4,913,001
    • Issue date Apr 3, 1990
    • Sanyo Electric Co., Ltd.
    • Ryuji Watanabe
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...