Patents by Inventor John Brian Porter

John Brian Porter 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).

  • Bending machines
    Patent number: 4012933
    Abstract: A bending machine having one or more bending units wherein a former device is movable to clamp a workpiece so that the workpiece can be bent by a bending arm and tool moved arcuately about the former device, and wherein the movement of the former device is reversible to free the bent workpiece from the bending unit.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: March 22, 1977
    Assignee: Russel Bowen Systems Ltd.
    Inventor: John Brian Porter