Patents by Inventor Andrew John Farrall

Andrew John Farrall 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).

  • Security, identification and verification systems
    Patent number: 7353994
    Abstract: A method of operating a security system includes making a plurality of security tags, each of which includes a plurality of particles randomly distributed in a light-transmitting matrix, providing a reader which includes means for causing light of one or more wavelengths to impinge on a security tag and means for interpreting the light reflected and/or refracted and/or diffracted by the particles in the matrix, and presenting said tags to said reader.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: April 8, 2008
    Inventors: Andrew John Farrall, Keith Michael Barfoot
  • Security, identificaiton and verification systems
    Publication number: 20040112962
    Abstract: A method of operating a security system includes making a plurality of security tags, each of which includes a plurality of particles randomly distributed in a light-transmitting matrix, providing a reader which includes means for causing light of one or more wavelengths to impinge on a security tag and means for interpreting the light reflected and/or refracted and/or diffracted by the particles in the matrix, and presenting said tags to said reader.
    Type: Application
    Filed: November 10, 2003
    Publication date: June 17, 2004
    Inventors: Andrew John Farrall, Keith Michael Barfoot