Robert J. Porthan

Person

  • Mokena, IL, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Conduit coupling assembly and method of use

    • Patent number 4,592,574
    • Issue date Jun 3, 1986
    • Allied Tube & Conduit Corporation
    • Lawrence P. Vollmuth
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...