Patent ID: 8064728

Claim:
A method for marking a device, comprising: forming a plurality of marks on a device, wherein at least two of the marks are unique from each other; defining a virtual array having a plurality of cells extending in an x-direction and a plurality of cells extending in a y-direction, wherein the marks are each positioned in a cell in the virtual array, wherein the virtual array is defined to have a discontinuous configuration, in which the virtual array includes a plurality of grid regions separated from one another by an area of the device having no cells of the virtual array grid regions therein; capturing an image including the relative cell position of the marks within the virtual array and converting the relative position of the marks within the virtual array into a set of coordinates including an x value along the x-direction and a y value along the y-direction for each of the marks; and generating a device identification using a plurality of the x values and the y values.