Inventors:
William H. Mowry - Ionia NY
Kathleen M. Gerew - Spartanburg SC
Assignee:
Burroughs Corporation - Detroit MI
International Classification:
B42D 1500
Abstract:
An improved copy-proof document is disclosed having a cancellation phrase and a background pattern each printed of a plurality of elements of a geometric shape having one or more smaller uncovered areas within said geometrically shaped element.