Patents by Inventor Ronald Perkowski

Ronald Perkowski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Welding apparatus having closely mounted shunts
    Patent number: 4291214
    Abstract: A spot welding machine having a pair of electrodes connected to the transformer by a pair of closely mounted shunts spaced less than one quarter of an inch to reduce both the current loss and the reactive forces.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: September 22, 1981
    Assignee: Bra-Con Industries, Inc.
    Inventors: John W. Arthurs, Ronald Perkowski