Patent ID: 6725202
Filing Date: 2004-04-20
Classification: G06Q,G07B,G07F

Abstract:
A method of tracking transactions in a system comprising an interrogator and a transponder having a transaction register, the method comprising the steps of:providing an interrogator and a transponder having a transaction register remote from said interrogator; providing a smartcard having data thereon and removably couplable to said transponder; coupling said smartcard to said transponder to set data including a transaction count from said smartcard into said transaction register of said transponder; sending an interrogation from said interrogator to said transponder when said transponder is within range of said interrogator to receive said interrogation above a predetermined minimum threshhold to commence operation of said transponder; sending a response to said interrogator from said transponder in response to said interrogation; modifying at said transponder said transaction count stored within said transaction register in response to an indication of a predetermined interrogation and response transaction being completed between said transponder and interrogator and communicated by said interrogator to said transponder; and storing said modified transaction count from said transaction register in said transponder in said smartcard.