Machine-readable symbol and related method
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United States of America Patent
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N/A
Issued Date -
Mar 20, 2003
app pub date -
Sep 16, 2002
filing date -
Sep 17, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A machine readable symbol includes a rectilinear data field having a plurality of data cells arranged into a matrix. Each data cell is assigned a data pattern value or a finder pattern value. Preferably, at least some of the data cells, or even all of the data cells, include at least one data pattern value and a finder pattern value which are overlapping. A color corresponding to the data pattern value, finder pattern value, or overlapping data pattern value and finder pattern value is assigned to each data cell. A finder pattern is discernable when the symbol is placed under a first color filter or exposed to a first color. A data pattern is discernable when the symbol is placed under a second color filter, or exposed to a second color.
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