发明名称 Game ticket confusion patterns.
摘要 <p>Security of game cards such as instant lottery tickets can be improved by locating a confusion pattern (32) below a primer layer (14) on a game cards substrate (12) and by locating another confusion pattern (34) on a release coat (24) above a game card play indica (20). Game card security can be further enhanced by using confusion pattern ink that bleeds through the game card in response to the application of various solvents.</p>
申请公布号 EP0568814(A2) 申请公布日期 1993.11.10
申请号 EP19930105312 申请日期 1993.03.31
申请人 SCIENTIFIC GAMES INC. 发明人 BEHM, WILLIAM FREDERICK;LITMAN, STANLEY;WALTON, BRADLEY WALTER
分类号 A63F3/06;(IPC1-7):A63F3/06 主分类号 A63F3/06
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