Patent ID: 8651389

Claim:
A method for designing one or more identity plates, wherein the one or more identity plates are placed on one or more shopping carts, the method comprising: representing a unique identity data using an identification code; encoding the unique identity data employing a plurality of symbols, each having one or more physical characteristics, wherein the association between the plurality of symbols and the identification code is predetermined; and forming the encoded unique identity data on an identity plate, wherein formation of the encoded unique identity data includes provision of a data redundancy, the provision of data redundancy comprising forming the plurality of symbols encoding the unique identity data on the identity plate in a grid having at least two columns and at least two rows, such that the plurality of symbols encoding the unique identity data is entirely formed (i) in at least a first row and in at least a second row or (ii) in at least a first column and in at least a second column of the grid or (iii) in at least one column and in at least one row, of the grid.