Radiant energy – Luminophor irradiation – With ultraviolet source
Reexamination Certificate
2006-08-22
2006-08-22
Gagliardi, Albert (Department: 2884)
Radiant energy
Luminophor irradiation
With ultraviolet source
C250S271000, C273S146000
Reexamination Certificate
active
07095033
ABSTRACT:
A system and method for authenticating a multi-sided die by viewing the die under invisible ultraviolet light. A die body has a plurality of sides of substantially equal area. A plurality of visible markings for indicating a roll of the die are disposed on the die sides. One or more of the markings include a substance which visibly reacts with invisible ultraviolet light. One or more authentication marks including a substance which visibly reacts with invisible ultraviolet light are arranged in a selected pattern on one or more of the die sides. A position of the authentication mark or marks in the selected pattern corresponds to the visible marking having a substance which visibly reacts with invisible ultraviolet light. An overlay key correlates the position of the authentication mark with the visible marking.
REFERENCES:
patent: 5909874 (1999-06-01), Daniel et al.
patent: 6596351 (2003-07-01), Thompson
patent: 2003/0218299 (2003-11-01), Zapata
patent: 2005/0235848 (2005-10-01), Butland
“How Black Lights Work” http://electronics.howstuffworks.com/black-light.htm (Visited on Jan. 23, 2004) (enclosed).
Collard & Roe P.C.
Gagliardi Albert
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