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United States of America Patent
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-
Mar 31, 1998
Grant Date -
N/A
app pub date -
Jul 13, 1994
filing date -
Jul 17, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data transfer system transfers data between a smartcard and a reader by transmitting a series of binary pulses, where the absence or presence of single predetermined pulses within the series communicate the data bits. By providing a function mode switch on the card, it may be used both for both private transactions and authorizations at a distance.
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