Patents Assigned to RoMan Manufacturing, Inc.
  • Portable impedance meter for resistance welding equipment
    Patent number: 4963830
    Abstract: A portable meter for measuring the impedance of a resistance welding circuit between first and second points on the apparatus. The meter is powered by conventional alternating current and conducts a test alternating current through the welding apparatus at such an amperage so that the voltage measured between the first and second points is equal to the impedance therebetween.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: October 16, 1990
    Assignee: RoMan Manufacturing, Inc.
    Inventors: Dietrich K. Roth, Kurt A. Hofman
  • Welding transformer
    Patent number: D791847
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: July 11, 2017
    Assignee: ROMAN MANUFACTURING, INC.
    Inventors: Donald B. DeCorte, Mark B. Siehling