Patent ID: 7623661

Claim:
A motion picture security code application system, comprising: (a) code symbol recording equipment for recording code symbols on a motion picture record medium; and (b) a control system for controlling said recording equipment to cause it to record on said record medium information comprising a plurality of separate coded symbols, each symbol representing a digit of a multi-digit security code and being recorded in a separate frame of a motion picture recorded on said record medium, in which each of said symbols comprises an array of visible marks representing one digit of a print identification number, said marks being large enough to avoid their eradication by the compression means used in a video camera used to make a copy of the motion picture recorded on said record medium when projected onto a motion picture display screen, but small and spaced apart so as to be essentially, unnoticeable by an ordinary viewer of the motion picture, each of said symbols comprising a selected combination of marks from a dot matrix.