Patent ID: 6995651
Filing Date: 2006-02-07
Classification: G06K

Abstract:
1. A transponder, comprising: a transceiver; an addressable memory having a first portion in which first identification data is stored, a second portion in which second identification data is stored, and a third portion in which indirect addressing data is stored; and a control logic unit coupled to the transceiver and the addressable memory, and the control unit, responsive to a command received by way of the transceiver, retrieves indirect addressing data from the third portion of the addressable memory and, based at least in part on the retrieved indirect addressing data, retrieves at least one of first or second identification data from the addressable memory, and the control logic unit including a time window determination means, the time window determination means coupled to receive identification data so retrieved from the addressable memory, and further coupled to receive an indication of the one or more addresses in the addressable memory from which the first or second identification data is retrieved.