Composite authentication mark and system and method for reading the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 12, 2002
Grant Date -
N/A
app pub date -
May 14, 1999
filing date -
Nov 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite authentication mark includes a bar code portion that is visible when illuminated with visible light and an invisible code portion that is not visible when illuminated with visible light, wherein the bar code portion includes a plurality of bars and spaces and the invisible code portion is arranged in at least one of the spaces of the bar code portion without overlapping any of the bars of the bar code portion. Because the invisible code portion does not overlap with any of the bars of the bar code portion, a single-step printing and reading processes may be used. More information can be coded by the composite authentication mark by using the relative location of the invisible code portion within the spaces of the bar code portion.
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