Anti-counterfeiting and diffusive screens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 6, 2004
Grant Date -
N/A
app pub date -
May 30, 2000
filing date -
Sep 30, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Anti-counterfeiting marking for documents, which marking may be disguised as an incidental or artistic feature of overall marking on the documents is adapted to be read by a complementary reading device. In one embodiment the marking may be a one, two or three-dimensional statistically fractal marking and is representative of an array of digits in which the value of each digit is represented by the fractal dimensions over a corresponding region or set of regions of the document bearing the marking. Corresponding apparatus for reading the anti-corresponding marking is also provided.
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Cited Art Landscape
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