Protected document bearing watermark and method of making

Details Protected document bearing watermark and method of making Protected document bearing watermark and method of making

1977-06-23

1980-07-01

Schran, Donald R.

Printed matter

Calendar

283 6, 283 8R, 428915, B42D 1500, B44F 112

Patent

active

042103460

ABSTRACT:
Disclosed is a protected document such as a negotiable instrument, a title instrument, identification document or other documents which should be kept secure from illegal copying by color copiers. The method of making the document comprising preprinting a "VOID" or other warning or cancellation phrase pattern in half tone or multitone on the document and camouflaging this pattern is also disclosed. The document bears a watermark which adds to the security of the system.

REFERENCES:
patent: 27116 (1860-02-01), Eidlitz
patent: 1002600 (1911-09-01), Morris et al.
patent: 1114346 (1914-10-01), Farmer
patent: 1428278 (1922-09-01), Dow
patent: 1692405 (1928-11-01), Freeman
patent: 3852088 (1974-12-01), Godlewski et al.
patent: 4175774 (1979-11-01), Tonges et al.
Sample of "Kids Paper" Mfg. by McGhee Printing Service of Stanford, Conn.; copyrighted by Miquette 1976.
IBM Technical Bulletin; vol. 17, No. 12, May, 1975, Weinberg.

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