Document having concealed electrically conductive authenticating

Details Document having concealed electrically conductive authenticating Document having concealed electrically conductive authenticating

1983-12-27

1986-04-01

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

And electrically conductive material

283 70, 427 7, B42D 1500, B41M 308

Patent

active

045793719

ABSTRACT:
A standardized document such as a credit card or drivers license contains an electrically conductive authenticating layer which is not visually discernible and has an electrical resistivity of less than 50 megohms per square. The presence of the authenticating layer may be verified by a proximity switch that can be built into mechanisms normally used in processing the document.

REFERENCES:
patent: 3245697 (1966-04-01), Nugent
patent: 3801183 (1974-04-01), Sevelin et al.
patent: 3922430 (1975-11-01), Mayer
patent: 4025759 (1977-05-01), Scheffel
patent: 4104515 (1978-08-01), Thornburg et al.
patent: 4228425 (1980-10-01), Cooke
patent: 4230344 (1980-10-01), Bell, Jr. et al.
patent: 4455039 (1984-06-01), Weitzen et al.

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