Security device

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United States of America Patent

PATENT NO 10022999
SERIAL NO

13696680

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Abstract

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A security device including a substrate carrying a surface relief optically variable effect generating structure formed by the super position of three diffractive image generating structures (rear, surface and front planes) which respond to respectively different color components or wavelength ranges of white light to generate a first, substantially achromatic image or background pattern located in a plane spaced from the surface of the substrate.

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Patent Owner(s)

Patent OwnerAddress
DE LA RUE INTERNATIONAL LIMITEDDE LA RUE HOUSE JAYS CLOSE VIABLES BASINGSTOKE HAMPSHIRE RG22 4BS

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Holmes, Brian William Fleet, GB 52 885

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