Covert label structure

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United States of America Patent

PATENT NO 8664605
APP PUB NO 20120033204A1
SERIAL NO

13258424

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Abstract

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A covert label structure comprising a three dimensional diffracting optical element layer (100) having a depth profile for producing a predetermined pattern, wherein different portions of a top surface of the diffracting optical element layer (100) have at least two different depths relative to a bottom surface of the diffracting optical element layer (100), wherein the depth profile spans across two dimensions of the top surface of the diffracting optical element layer (100), and wherein the top surface reflects light according to the predefined pattern and an overcoat layer (108) over the top surface of the diffracting optical element layer (100) wherein the overcoat layer (108) is opaque to at least one wavelength of light.

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Patent Owner(s)

  • HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bratkovski, Alexandre M Mountain View, US 157 1847
Thylen, Lars Helge Huddinge, SE 14 81

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