Reusable bingo card
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 31, 1989
Grant Date -
N/A
app pub date -
Feb 6, 1987
filing date -
Feb 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reusable bingo card comprising an exposed microporous layer having bingo numbers permanently imprinted thereon, and a liquid impervious support sheet bonded to the exposed layer. The support sheet is substantially darker than the background area of the exposed layer. To mark a number on the card a colorless volatile liquid is applied to the exposed layer making the applied area transparent and exposing the support sheet below producing a contrasting indicia that is darker than the background area but lighter than the numbers. Evaporation of the marking liquid restores the bingo card to its original appearance for reuse.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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