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David G. Williams

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  • South Wirral, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Valve component
    • Patent number 4,574,835
    • Issue date Mar 11, 1986
    • The Metallic Valve Company Limited
    • David G. Williams
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...