Machine readable coded data with distributed encoding
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United States of America Patent
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Mar 21, 2006
Issued Date -
N/A
app pub date -
Jul 19, 2004
filing date -
Oct 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Machine-readable coded data disposed on or in a substrate. The coded data includes a plurality of layouts located in a region, each layout having n identical sub-layouts rotated 1/n revolutions apart about a center of rotation. Each layout encoding a first codeword formed from a sequence of n first symbols, with each sub-layout defining the position of a respective one of the first symbols such that the first codeword is indicative of the orientation of the layout. Each layout also partially encodes a third codeword at least partially indicative of an identity of the region such that the region identity may be determined from two or more of the layouts.
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