G - Physics – 06 – K
Patent
G - Physics
06
K
354/55, 352/57
G06K 7/10 (2006.01) D21H 21/48 (2006.01) G07D 7/10 (2006.01)
Patent
CA 1159565
Abstract: The invention relates to the making of sheet articles of non-conducting material for identification. The article is marked by the incorporation therein of a small quantity of very thin conductive fibres capable of both absorbing and reflecting microwaves. The part of the article con- taining the fibres is placed in the path of an unguided microwave beam and the excess microwave energy arrested over that reflected is measured. An output signal is produced which is representative of the excess. The output signal is characteristic of the fibres and can be used to authenticate the articles of non-conductive material, such as banknotes, passports and bonds, because the characteristic signal is very difficult to simulate by a counterfeiter.
350374
Kirby Eades Gale Baker
N.v. Bekaert S.a.
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