Method for exchanging data between an automatic dispenser and a microcircuit card
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United States of America Patent
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Jun 8, 2004
Grant Date -
N/A
app pub date -
Apr 6, 2001
filing date -
Oct 13, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The card contains value information suitable for being debited by the machine in consideration for delivering goods or service. The machine causes a ratification flag stored in the non-volatile memory of the card to be modified between two states, namely: a ratified state corresponding to the case where the preceding transaction performed with the card, whether with the same machine or with another machine, took place correctly, and a non-ratified state for the case when said preceding transaction was interrupted in the course of being executed. The machine successively: conditionally debits the card if the flag is in the ratified state; causes the card to put the flag in the non-ratified state if a debit took place in the preceding step; then causes the goods or service to be delivered; and if delivery takes place effectively in the preceding step, causes the flag to be put by the card into the ratified state.
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