Electronic validation machine for documents
First Claim
1. An electronic validation machine for use with a document having a circuit element printed thereon:
- document interface means for receiving the document;
coupling means for electronically coupling with the circuit element when the document is received by said document interface means; and
detection means operatively connected to said coupling means for generating a detection signal identifying the circuit element.
4 Assignments
0 Petitions
Accused Products
Abstract
Information can be obtained from a document having printed electronic circuits by using an electronic verification machine that determines the electrical characteristics or signatures of the circuits printed on the document. The electronic verification machine electronically couples with the circuit and applies an excitation signal such as an AC signal having a predetermined frequency to the circuit. A detection circuit in the electronic verification machine then generates a detection signal in response to the excitation signal which represents the characteristics of the circuit printed on the document. The electronic verification machine can also be used to stigmatize the document by applying a signal to the electronic circuits having sufficient strength to alter the electronic circuit.
275 Citations
67 Claims
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1. An electronic validation machine for use with a document having a circuit element printed thereon:
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document interface means for receiving the document; coupling means for electronically coupling with the circuit element when the document is received by said document interface means; and detection means operatively connected to said coupling means for generating a detection signal identifying the circuit element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An electronic document system comprising:
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a document having a circuit element primed on said document; and an external verification machine having coupling means for coupling with said circuit element and signature means for generating a signature signal representing an electrical characteristic of said circuit element. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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Specification