Patents by Inventor Willis W. Sunderland

Willis W. Sunderland 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).

  • Embossing method
    Patent number: 3943741
    Abstract: A cup-shaped blank is extruded through a die onto a cylindrical non-collable mandrel having an external surface pattern counter to a desired internal embossment. Subsequently, the embossed portion of the blank is hydrostatically expanded away from the mandrel to permit removal of the embossed part from the mandrel. The application of hydrostatic pressure to the exterior of the blank during the extruding operation is disclosed.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: March 16, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Willis W. Sunderland