A substrate having a coding pattern disposed on a surface thereof. The coding pattern includes a plurality of target elements defining a target grid. The target grid has a plurality of cells, wherein neighboring cells share target elements. A plurality of data elements are contained in each cell. Tags...http://www.google.com.au/patents/US8016204?utm_source=gb-gplus-sharePatent US8016204 - Coding pattern with fragments of common data distributed in each tag
