Patent ID: 7938326
Filing Date: 2011-05-10
Classification: F25D,G06K,G06Q,G07F,G07G,H04W,Y02D

Abstract:
1. A method for monitoring a change in number of a plurality of products in a designated area, wherein each of the plurality of products includes a radio frequency identification tag, and wherein a radio frequency antenna is provided in proximity to the designated area, comprising: performing a first minimum plurality of radio frequency scans of the designated area, via the radio frequency antenna, wherein each scan produces a respective set of first radio frequency identification tag information; determining a first number of the plurality of products based on the respective sets of first radio frequency identification tag information obtained from the first minimum plurality of radio frequency scans; performing a second minimum plurality of radio frequency scans of the designated area, via the radio frequency antenna, wherein each scan produces a respective set of second radio frequency identification tag information; and determining a second number of the plurality of products based on the respective sets of second radio frequency identification tag information obtained from the second minimum plurality of radio frequency scans, wherein a difference between the second number and the first number represents the change in number of the plurality of products.