Patents by Inventor Jonathan Michael Blackledge

Jonathan Michael Blackledge 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).

  • Anti-counterfeiting and diffusive screens
    Patent number: 6674875
    Abstract: Anti-counterfeiting marking for documents, which marking may be disguised as an incidental or artistic feature of overall marking on the documents is adapted to be read by a complementary reading device. In one embodiment the marking may be a one, two or three-dimensional statistically fractal marking and is representative of an array of digits in which the value of each digit is represented by the fractal dimensions over a corresponding region or set of regions of the document bearing the marking. Corresponding apparatus for reading the anti-corresponding marking is also provided.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: January 6, 2004
    Assignee: Durand Limited
    Inventors: Nicholas John Phillips, Jonathan Michael Blackledge, William Nevil Heaton Johnson
  • Applications of fractal and/or chaotic techniques
    Publication number: 20030182246
    Abstract: This invention relates to the application of techniques based upon the mathematics of fractals and chaos in various fields including document verification, data encryption and weather forecasting. The invention also relates, in one of its aspects, to image processing.
    Type: Application
    Filed: February 20, 2003
    Publication date: September 25, 2003
    Inventors: William Nevil Heaton Johnson, Jonathan Michael Blackledge, Bruce Lawrence John Murray