Security device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 7, 2005
Grant Date -
May 27, 2004
app pub date -
Jun 27, 2001
filing date -
Jun 28, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A security device has a substrate formed with a surface relief defining an optically variable effect generating structure. At least two different reflection enhancing materials are provided on, or on the same side of, substrate with respect to the surface relief, whereby the optically variable effect can be viewed against a background defined by the reflection enhancing materials.
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Cited Art Landscape
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