Plural color anti-copying systems for xerographic and electrosta

Details Plural color anti-copying systems for xerographic and electrosta Plural color anti-copying systems for xerographic and electrosta

1979-09-17

1981-08-04

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Methods

355133, G03B 2732

Patent

active

042819210

ABSTRACT:
An anti-copying system or method of coloring an original document with pre-selected background and image colors which, in combination, inhibit or prevent intelligible reproduction on xerographic and electrostatic copying machines.

REFERENCES:
patent: 3852088 (1974-12-01), Godlewski et al.
patent: 3887742 (1975-06-01), Reinnagel
patent: 4118122 (1978-10-01), Rees et al.

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