US Patent 7687271 Covert authentication method and apparatus
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Patent abstract
An authentication system uses the unique distribution of an invisible taggant as a “signature” to identify an item. The verification is error tolerant. The taggant is made visible to a camera by special illumination. Inert taggants, with no optical activity, can be made visible by their thermal properties.
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Patent Inventor Names
Daniel Gelbart0
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US Patent 07687271 Covert authentication method and apparatus US Patent 7687271 Covert authentication method and apparatus
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Patent Number
07687271
Patent Number
7687271
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US Patent 07687271 Covert authentication method and apparatus
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Is a
Patent jurisdiction
Patent number
07687271
Date of patent
March 30, 2010
Patent application number
10829368
Date Filed
April 22, 2004
Patent primary examiner
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