发明名称 LOTTERY GAME CARD WITH THERMAL INK TO HIGHLIGHT GAME INDICIA
摘要 A scratch off lottery game card including a substrate on which a plurality of game indicia are printed on the substrate and a layer of translucent thermal ink coating is placed upon the lottery game card covering the game indicia. The translucent thermal ink coating changes its color when heat is applied, typically from the player scratching the game indicia.
申请公布号 WO2008024187(A2) 申请公布日期 2008.02.28
申请号 WO2007US17263 申请日期 2007.08.01
申请人 SCIENTIFIC GAMES INTERNATIONAL, INC.;STEPHENS, KENNETH, A. 发明人 STEPHENS, KENNETH, A.
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