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David C. Butler

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  • Ogden, UT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pneumatic controlled slam shut valve
    • Patent number 9,027,581
    • Issue date May 12, 2015
    • Dresser, Inc.
    • David C. Butler
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents