System and method for issuing electronic tickets
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 5, 2003
Grant Date -
N/A
app pub date -
May 19, 2000
filing date -
May 19, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention adds a graphic field to an electronic ticket. The graphic field is designed to produce a 'tell' a visible known image (a large number of detectable halftone gray steps) when printed by a personal computer printer. Additionally, the graphic field will change in appearance when the ticket originally printed by the personal computer printer is digitally reproduced by either scanning or photocopying. The foregoing makes it more difficult to copy and/or forge the ticket.
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