Temporary key invalidation for electronic key and locking...

Details Temporary key invalidation for electronic key and locking... Temporary key invalidation for electronic key and locking...

2007-01-23

2007-01-23

Pope, Daryl C (Department: 2612)

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

C340S430000, C340S426110, C340S426350, C307S010100, C307S010300

Reexamination Certificate

active

11054570

ABSTRACT:
Methods and apparatus are provided for rendering electronic keys left behind in a vehicle temporarily inactive. The apparatus comprises a vehicle security control module in wireless communication with the electronic keys, and having operatively coupled together a receiver, a processor, non-volatile memory and a short-range transmitter. When the module receives a valid lock command from any source it sends a short-range interrogation signal to keys within the vehicle. Left-behind keys respond and send their unique ID(s) to the module's receiver. The processor obtains the unique ID(s) from the receiver and sets one or more inhibit flags in memory or equivalent to identify those keys as left-behind keys. The processor thereafter ignores commands from such left-behind keys, thereby rendering them temporarily inoperative until a valid unlock command is received form another source, whereupon the processor clears the inhibit flags from memory and restores the left-behind keys to active status.

REFERENCES:
patent: 5337588 (1994-08-01), Chhatwal
patent: 5831520 (1998-11-01), Stephan
patent: 2004/0054934 (2004-03-01), Emmerling et al.

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