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David Da-Wei Zhang

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  • Doncaster, AU
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Patents Grantslast 30 patents

  • Information Patent Grant

    Impeller sealing arrangement
    • Patent number 6,837,677
    • Issue date Jan 4, 2005
    • Davey Products Pty. Ltd.
    • David Da-Wei Zhang
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...