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Radio Frequency Identification System and Data Reading Method

  • US 20090014520A1
  • Filed: 09/03/2008
  • Published: 01/15/2009
  • Est. Priority Date: 03/09/2006
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) data tag comprising a plurality of diffractive symbol elements being indicative of machine-readable data carried by the tag, said diffractive symbol elements having such shape that the dimension of said diffractive symbol elements along one axis being substantially different than the dimension of the elements along the perpendicular axis, each diffractive symbol element being oriented in a direction other than the direction of its neighboring elements.

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