Patents by Inventor Christopher Peter Tierney

Christopher Peter Tierney 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 devices incorporating colour shifting inks
    Patent number: 9251550
    Abstract: A security document or device is provided which includes at least one area formed from a transparent plastics material which is exposed on at least one side to form a window or half-window, and a first color shifting ink composition and a second color shifting ink composition which both include different color pigments and interference pigments but which both, at a first viewing angle, exhibit substantially the same color when the interference pigments are viewable, and at other angles exhibit different colors when viewing the color pigments.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: February 2, 2016
    Assignee: INNOVIA SECURITY PTY LTD
    Inventor: Christopher Peter Tierney
  • SECURITY DEVICES INCORPORATING COLOUR SHIFTING INKS
    Publication number: 20140126765
    Abstract: A security document or device is provided which includes at least one area formed from a transparent plastics material which is exposed on at least one side to form a window or half-window, and a first colour shifting ink composition and a second colour shifting ink composition which both include different colour pigments and interference pigments but which both, at a first viewing angle, exhibit substantially the same colour when the interference pigments are viewable, and at other angles exhibit different colours when viewing the colour pigments.
    Type: Application
    Filed: June 25, 2012
    Publication date: May 8, 2014
    Applicant: INNOVIA SECURITY PTY LTD
    Inventor: Christopher Peter Tierney