Document marking system employing context-sensitive embedded mar

Details Document marking system employing context-sensitive embedded mar Document marking system employing context-sensitive embedded mar

1991-07-26

1995-11-14

Jankus, Almis R.

395148, G06F 1700

Patent

active

054674476

ABSTRACT:
A system for generating documents which, as well as presenting the usual alpha-numeric text information, contain a distinctive marking. The marking scheme of the invention can convey identifying information which, in the event of a document coming into the possession of an unauthorized person, allows a particular copy of a document to be traced to its source. The invention can also be used to distinctively identify each of a number of photocopies made from an original document.

REFERENCES:
patent: 3652828 (1972-03-01), Sather et al.
patent: 4025759 (1977-05-01), Scheffel
patent: 4158433 (1979-06-01), Peterson et al.
patent: 4480179 (1984-10-01), Schaefer et al.
patent: 4783760 (1988-11-01), Carosso
patent: 4908873 (1990-03-01), Philibert et al.

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