Patents by Inventor Cecil Sheldon Renfro

Cecil Sheldon Renfro 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).

  • Outdoor electronic sign enclosure
    Publication number: 20040000390
    Abstract: An outdoor electronic sign enclosure includes a sealed housing. A heat exchanger forms a part of the sealed housing. An air circulation system is coupled to the heat exchanger.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 1, 2004
    Inventors: Robert Charles Stadjuhar, Cecil Sheldon Renfro