System and method for location recognition using IC tags
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United States of America Patent
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Oct 20, 2009
Grant Date -
May 10, 2007
app pub date -
Jan 13, 2005
filing date -
Jan 13, 2004
priority date (Note) -
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Abstract
Locations of IC tags affixed to items are automatically recognized without requiring interrogators or antennas are allocated at respective inventory locations.sequentially reply their unique IDs (Xa), (Xb), (Xc) respectively.sequentially send out probe signals respectively. specified as adjacent ID.sequentially reply adjacent IDs (Xb), (Xa.Xc), (Xb) stored in their memory respectively. are obtained and any identical combinations are excluded so that (Xa-Xb), (Xb-Xc) remain as final combinations, and the final combinations having one side in common are joined to produce a link pattern of ID information.
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