Rickard N. Crewes

Person

  • Uniontown, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid swivel valve device

    • Patent number 4,413,645
    • Issue date Nov 8, 1983
    • National Machine Company, Inc.
    • Peter P. Seabase
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...