Patents by Inventor Patrick E Kniveton

Patrick E Kniveton 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).

  • Display sign and an optical element for use in the same
    Patent number: 5939996
    Abstract: An optical element is fitted to a high intensity light emitting diode used in a variable message sign. The optical element has surfaces which redirect any stray light from the light emitting diode to form useful light. The faces of the optical element are angled to shape the light beam emitted therefrom. The light beam is shaped by the faces to produce a beam having increased intensity in a predetermined direction. The optical element enhances the visibility of the sign and allows a reduction in the number of light emitting diodes used in the sign.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: August 17, 1999
    Assignee: Rolls-Royce Power Engineering plc
    Inventors: Patrick E Kniveton, John H Brown