Methods for identification and verification

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

Reexamination Certificate

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C428S207000, C428S323000, C428S916000

Reexamination Certificate

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07041362

ABSTRACT:
An identifiable code pattern, a method of providing a carrier material with an identifiable code pattern, and a method for detecting an identifiable code pattern are based on applying water-soluble nanocrystals to carrier materials in a spatially arranged format that can be detected by exposing the identifiable code pattern to an excitation light source in exciting the water-soluble nanocrystals, and detecting any fluorescence peaks emitted from the excited water-soluble nanocrystals using a detection system.

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