Patents by Inventor James F. Helgert

James F. Helgert 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).

  • Duplicating punch press with stylus control
    Patent number: 4033216
    Abstract: A stylus is mounted on a carriage which also supports a work plate adapted to be positioned beneath a punch. When the punch first strikes the work plate, the stylus is automatically retracted out of a hole in a template so as to free the carriage to shift forwardly in unison with the work plate as the punch continues through the plate.
    Type: Grant
    Filed: September 24, 1976
    Date of Patent: July 5, 1977
    Assignee: W. A. Whitney Corporation
    Inventors: Theodore F. Brolund, James F. Helgert