Patent ID: 7501943
Filing Date: 2009-03-10
Classification: G06K,H04Q

Abstract:
1. A method for tagging plural items with information related to the items, said method comprising the steps of: for each item to which information is to be appended, selecting a plurality of reflective tone ranges, each of said tone ranges representing a particular byte of data to be associated with said item, and each reflective tone of which represents a bit value of said byte, and also selecting a further reflective tone range, which represents a checksum reflective tone range; for each item to which information is to be appended, randomly selecting a reflective tone within each of said selected reflective tone ranges; for each item to which information is to be appended, generating a first checksum of said randomly selected reflective tones; preparing a tag including reflective elements which are electromagnetically reflective at said selected tones, including said first checksum tone; associating said tag with the corresponding item to produce a tagged item; recording at least said randomly selected reflective tones, said first checksum, and their association with the corresponding item, to produce recorded information; and associating said recorded information with said tagged item.