Patents Assigned to Canadian Bank Note Co., Ltd.
  • Latent images comprising phase shifted micro printing
    Patent number: 5178418
    Abstract: A security device comprising a substrate having applied thereto an array of characters, the characters being of a sufficiently small size as to appear uniform when ordinarily viewed but individually identifiable when viewed with the aid of appropriate magnification means, whereby group(s) of the characters are phase-shifted relative to the others in such a manner as to collectively define an image, the image being relatively indiscernible when the device is ordinarily viewed but discernible when viewed with the aid of a finding screen.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: January 12, 1993
    Assignee: Canadian Bank Note Co., Ltd.
    Inventors: Trevor Merry, Alan R. Boate