Patent ID: 6455157
Filing Date: 2002-09-24
Classification: G06K,G09F,Y10S,Y10T

Abstract:
A method for protecting and marking products by using microparticles, which aye to be attached or added to the product, each microparticle having several color layers forming a code, wherein for each individual product two or more differently coded microparticle groups are used, with the first microparticle group containing in its code the same information for plurality of products, and with the second or subsequent microparticle group containing in its code an information which is individual for each individual product or for few products, whereinthe second microparticle group is formed by microparticles describing the unit place and the tens place of a decimal number; an optionally provided third microparticle group is formed by microparticles describing the hundreds place and the thousands place of a decimal number; an optionally provided fourth microparticle group is formed by microparticles describing the ten thousands place and the hundred thousands place of a decimal number wherein microparticles with four layers are used for the second and optionally third and optionally fourth microparticle group microparticles, which beside the group marking color have two numeral color layers and a separating color layer between The numeral color layers, wherein the color of each numeral color layer is selected out of ten different colors corresponding to the decimal numerals 0 to 9; and the microparticles of each microparticle group have at least one own group marking color layer.