Patent ID: 8392715
Filing Date: 2013-03-05
Classification: G07D

Abstract:
1. A document identification method, that comprises an identification device executing the sequential steps of: a step of marking a plurality of documents each with i) a uniform area and ii) an anti-copy mark that is identical for each different document of the plurality of documents, the anti-copy mark comprising a number of different erroneous cells for each of the different documents of the plurality of documents, for each of the different documents, a step of the identification device reading an anti-copy mark to provide information dependent on the erroneous cells, for each of the different documents, a step of the identification device generating an identification mark that varies from one document to another document, each generated identification mark depending on the read erroneous cells of the anti-copy mark of the corresponding document, and for each of the different documents, a step of the identification device marking said document with said generated identification mark to form said identification mark on said document, wherein said marking step comprises emitting light with a laser in the uniform area to form the identification mark.