TREA

George W. Kardos

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  • Euclid, OH, US
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  • Information Patent Grant

    Vent check valve
    • Patent number 3,954,121
    • Issue date May 4, 1976
    • The Weatherhead Company
    • George W. Kardos
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...