G - Physics – 07 – D
Patent
G - Physics
07
D
352/50, 340/124.
G07D 7/00 (2006.01) D21H 21/48 (2006.01) G06K 19/10 (2006.01) G07D 7/10 (2006.01) G07D 7/20 (2006.01) G07F 7/08 (2006.01)
Patent
CA 1274017
ABSTRACT : A method and an apparatus for chocking the authenticity of documents, such as banknotes or credit-cards. The documents comprise a number of randomly distributed conductive fibres of which the distribution is scanned by microwaves and the response is transformed into a digital coded signal. A digital mark on the document, which is representative for the distribution of an individual document, is read off, transcoded, and compared with said coded signal for producing an approval signal. The use of a microwave scanning system in conjunction with documents having a random distribution of suitable fibres ensures a great repetitivity and security of the system.
518396
Kirby Eades Gale Baker
N.v. Bekaert S.a.
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