Security document with security marking formed of transparent windows
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 14, 2003
Issued Date -
N/A
app pub date -
Apr 9, 2001
filing date -
Jan 15, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Security document (1) with security indicia (21) for preventing unauthorised reproduction, the security indicia being detectable in transmitted light, wherein the security indicia are located within the bounds of a security pattern (20) acting to visually conceal the security pattern in reflected light. The security pattern may be formed of one or more elements (25) and may have a complexity selected to enable the concealment of the security indicia (21).
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