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Electronic vehicle product and personal monitoring

  • US 7,100,052 B2
  • Filed: 01/30/2002
  • Issued: 08/29/2006
  • Est. Priority Date: 02/01/2001
  • Status: Active Grant
First Claim
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1. A method for detecting and tracking a plurality of objects passing through or located in a predetermined portal area, comprising:

  • detecting presence of the objects at a first position within the portal area;

    detecting presence of the objects at a second position within the portal area;

    identifying the objects by interrogating with tags attached to or carried by the objects; and

    determining direction of movement of the objects according to detection sequence between the first and second positions.

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