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David Joseph Greif

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  • Marshalltown, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid valves having an integral safety shut-off
    • Patent number 8,413,682
    • Issue date Apr 9, 2013
    • Fisher Controls International, LLC
    • David Joseph Greif
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Fluid valves having an integral safety shut-off
    • Patent number 8,033,294
    • Issue date Oct 11, 2011
    • Fisher Controls International, LLC
    • David Joseph Greif
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents