TREA

Hayashi Seiko Co., Ltd.

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  • Tokushima, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Screw pump
    • Patent number 5,102,294
    • Issue date Apr 7, 1992
    • Hayashi Seiko Co., Ltd.
    • Akira Hayashi
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Screw pump
    • Patent number 4,772,177
    • Issue date Sep 20, 1988
    • Hayashi Seiko Co. Ltd.
    • Akira Hayashi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...