Patent ID: 7095033
Filing Date: 2006-08-22
Classification: A63F,G06K

Abstract:
1. A system for authenticating a multi-sided die by viewing under ultraviolet light, the system comprising: (a) a die body having a plurality of sides of substantially equal area; (b) a plurality of visible markings disposed on said plurality of sides for indicating a result of a roll of the die, wherein one or more of said plurality of visible markings include a substance which reacts visibly in a presence of invisible ultraviolet light; (c) one or more authentication marks arranged in a selected pattern on one or more of said plurality of sides, wherein at least one of said one or more authentication marks comprises a substance which reacts visibly in the presence of invisible ultraviolet light and wherein a position of said at least one of said one or more authentication marks, comprising a substance which reacts visibly in the presence of invisible ultraviolet light, corresponds to one of said plurality of visible markings which include said substance which reacts visibly in the presence of invisible ultraviolet light; (d) an overlay key for correlating said position of said at least one of said one or more authentication marks comprising a substance which reacts visibly in the presence of invisible ultraviolet light marks with said visible marking including said substance which reacts visibly in a presence of invisible ultraviolet light.