Lottery ticket having validation data printed in developable invisible ink
US5286061A · kind A · utility
49Cited by
30References
47Claims
0Family size
Assignee
Key dates
| Filing date | Oct 9, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Oct 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/903
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A game ticket has validation data printed on the ticket substrate in invisible ink. The invisible validation data is capable of being irreversibly rendered visible by application of a developing agent. The ticket also has play indicia printed within the play area of the ticket and a removable layer affixed to the ticket over the game area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.