Abstract: The present invention is addressed to providing a simple, yet reliable method for labeling an object for its verification. Broadly, the method of the present invention for labeling an object for its verification commences with applying to a predetermined location on said object, a mark which creates a permanent impression thereof which is perceptible to the unaided or naked eye and a mark which creates a permanent impression thereof which is imperceptible to the unaided or naked eye, yet which can be determined by mechanical, electrical, and/or biologic means. In prior U.S. Pat. No. 5,194,289 a combination of UV eye and amino acid/protein fragment was used to label objects for their identification. The present invention broadens such dual labeled scheme to include a variety of additional "invisible" labeling techniques. Additionally, the present invention includes the recognition that, in order to stop counterfeiting of records and like consumer goods, a visible mark also must be present on the object.

Abstract: Disclosed is a method for labeling an object for its identification. The method comprises applying a selected person's fingerprint to said object at a predetermined location upon said object. Next, the predetermined location is exposed to a vaporous agent comprising vapors of a cyanoacrylate ester. The selected person's fingerprint or said vapors of cyanoacrylate ester bear a detectable amount of an ultra-violet radiation sensitive dye. Exposing the predetermined location to said vapors create a permanent impression of the fingerprint on the object which impression is perceptible only in the presence of UV radiation. Prime objects for identification in accordance with the method of the present invention include works of art, negotiable instruments, credit card receipts, and like objects.