A lottery game card including a plurality of squares distributed in a matrix format, and a plurality of game indicia initially covered by a removable material. Each squares of the matrix are populated with a game symbol and some of the squares of the matrix are covered by the removable material, forming...http://www.google.ca/patents/US7458580?utm_source=gb-gplus-sharePatent US7458580 - Lottery game card having a Sudoku game
