Patents by Inventor Robert E. Barnabo

Robert E. Barnabo 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).

  • Cold drawing die for drawing polygonal shapes
    Patent number: 4211104
    Abstract: A cold drawing die for drawing round bar stock into shapes such as polygons. The die acts continuously on the full circumference of the round bar stock to uniformly deform the stock and yield polygons to exacting specifications using a starting material only slightly larger than the maximum diameter of the finished shape. A pure polygon and a hybrid polygon shape are disclosed.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: July 8, 1980
    Assignee: Barnabo Steel Corporation
    Inventors: Robert E. Barnabo, Karl J. Hyslop