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United States of America Patent
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Mar 18, 2014
Grant Date -
Jul 19, 2007
app pub date -
Jan 13, 2006
filing date -
Jan 13, 2006
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Abstract
A method for determining whether portions of text have been copied during electronic copying, photocopying, or scanning of a document. The method comprises generating a target code from a target passage of the text, determining whether a sample passage of text includes the target code, and, upon successful determination, initiating an action if the sample passage of text includes the target code. A method of generating a code representative of a passage of text uses a spacing between respective occurrences of one or more key symbol strings within the text. By comparing the known code of a target text passage with the code generated from a sample text passage, it is easy to determine whether the target text has been used within the sample. The method may be integrated within a copying device.
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