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Douglas W. Ruffley

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  • Highland, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Safety lock-out valve
    • Patent number 4,000,684
    • Issue date Jan 4, 1977
    • Numatics, Incorporated
    • Douglas W. Ruffley
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...