Patent ID: 9269035
Filing Date: 2016-02-23
CPC Classification: B41J,G06K

Claim Text:
1. A method for marking a substrate with a two-dimensional identification code represented by an array of designated and undesignated geometric areas, comprising: generating laser pulses; and directing the laser pulses at the substrate to form a distribution of spots on or within the substrate, wherein the distribution of spots represents the two-dimensional code and comprises multiple groups of spots, including first and second groups that each include multiple spaced-apart spots, wherein each of the first and second groups of spots is representative of a designated geometric shape, such that the distribution of spots forms an array of multiple rows and columns of geometric areas, wherein some of the geometric areas include one group of spots and some of the geometric areas are devoid of spots such that the geometric areas that include one group of spots represent the designated geometric areas and such that the geometric areas that are devoid of spots represent the undesignated geometric areas.