Method for authenticating a spare key for using a vehicle
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United States of America Patent
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-
Feb 21, 2006
Grant Date -
Feb 3, 2005
app pub date -
Jun 30, 2004
filing date -
Jan 15, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a method for authenticating a spare key for use with a vehicle in the absence of the regular key, the spare key is provided with an identification number that is transmitted to, and checked by, a central station. The spare key is authenticated by an authorization signal sent from the central station to the vehicle.
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