Patents by Inventor Robert W. Ferree

Robert W. Ferree 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).

  • Portable traffic signal light
    Patent number: 3995250
    Abstract: A portable apparatus providing for a temporary installation of a traffic control signal meeting the visual display requirements as specified by government authorities for standard traffic control lights.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: November 30, 1976
    Inventor: Robert W. Ferree