Patents by Inventor Barry Alan Hood

Barry Alan Hood 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).

  • Monitoring of covert marks
    Patent number: 6100967
    Abstract: A method and apparatus for monitoring a body having a reflective surface (1), a coating layer (2) of material transparent to visible light present on the surface (1) and producing a covert optical discontinuity in an imagewise distribution on the layer (2); the imagewise distribution is such that it is visible via polarized light (7) and viewing through a polarized filter (8).
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: August 8, 2000
    Assignee: SLS Biophile Limited
    Inventors: Richard Mark Farrer, Barry Alan Hood