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Alvin Coughenour

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  • Elizabeth, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dual purpose dimple for HVAC circular ductwork
    • Patent number 8,973,954
    • Issue date Mar 10, 2015
    • Ductmate Industries, Inc.
    • Alvin Coughenour
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dual purpose dimple for HVAC circular ductwork
    • Patent number 8,429,803
    • Issue date Apr 30, 2013
    • Ductmate Industries, Inc.
    • Alvin Coughenour
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents