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John B. McGowan

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  • Malvern, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gravity-operated gas shut-off valve
    • Patent number 5,704,391
    • Issue date Jan 6, 1998
    • Umac Incorporated
    • John B. McGowan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gas supply safety device
    • Patent number 4,958,657
    • Issue date Sep 25, 1990
    • Umac Incorporated
    • Thomas E. Hagan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method and apparatus for plugging and cutting a gas line or the lik...
    • Patent number 4,295,494
    • Issue date Oct 20, 1981
    • UMAC, Inc.
    • John B. McGowan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...