ApplicationNo. 722083 filed on 10/18/1996
US Classes:235/494, Particular code pattern235/454Optical
ExaminersPrimary: Pitts, Harold I.
Attorney, Agent or Firm
Foreign Patent References
International ClassG06K 019/06
Foreign Application Priority Data1994-04-29 GB
AbstractA machine readable binary code includes a two-dimensional matrix of data cells (6) having a plurality of sides. A unique sub-array of data cells (1, 2, 3, 4) is positioned at the point of intersection of each pair of adjacent sides to define and uniquely identify each corner of the matrix.