A method and apparatus are disclosed for determining the authenticity of secured documents which include an authentication element of the type which, when excited with radiation of a specific excitation wavelength, emits radiation which can be detected by a detection unit and evaluated by an evaluating...http://www.google.es/patents/US7092583?utm_source=gb-gplus-sharePatente US7092583 - Apparatus and method for detecting the authenticity of secured documents
Apparatus and method for detecting the authenticity of secured documents
