Patents by Inventor Clifford W. Leverenz

Clifford W. Leverenz 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).

  • Collapsible billboard sign
    Patent number: 5613314
    Abstract: A collapsible sign, including a fixed frame, a plurality of sections hingedly and movably attached to the frame, the sign being movable the sections between a viewing position and a collapsed position. Adjacent pairs of the plurality of sections are positioned to provide an offset distance between axes of rotation located at each end of each section when the plurality of sections are in the viewing position.
    Type: Grant
    Filed: March 16, 1995
    Date of Patent: March 25, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Clifford W. Leverenz, Jamshed R. Cooper, Stephen P. Sohm, Jehangir E. Rudina, Steven C. Larson