Patents by Inventor Tammy M. Willingham

Tammy M. Willingham 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).

  • Patent number: 6580472
    Abstract: A vehicle window tinting system includes liquid crystal material contained within a liquid crystal cell embedded within the side windows of a vehicle. A liquid crystal cell is likewise embedded within the vehicle rear window and is scripted to form a readable message. The liquid crystal cells are each electrically connected to the vehicle battery via a designated switch. When a switch corresponding to a window is activated, an electrical current is delivered to the liquid crystal cells thereby decreasing the transmittance of the window. If the switch corresponding to the rear window is activated, the readable message appears thereon.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: June 17, 2003
    Inventors: Michael A. Willingham, Tammy M. Willingham