Vehicle anti-theft device using both electromagnetic induction a

Details Vehicle anti-theft device using both electromagnetic induction a Vehicle anti-theft device using both electromagnetic induction a

1998-03-24

2000-01-04

Elms, Richard T.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307104, 180287, B60R 2500

Patent

active

060113200

ABSTRACT:
A key entry system having redundant communication between the IC card and the vehicle controller to ensure continuous operation. The ID card and the vehicle controller each includes a memory for storing an ID code, an electromagnetic induction power supply/transmission circuit for transmitting and receiving the ID code and an RF modem also for transmitting and receiving the ID codes. Thus, in the event that communication cannot be made between the RF modems, the key entry system will still function by communication between the electromagnetic induction power supply/transmission circuits.

REFERENCES:
patent: 5473200 (1995-12-01), Woo
patent: 5644172 (1997-07-01), Hodges
patent: 5686765 (1997-11-01), Washington
patent: 5804888 (1998-09-01), Murr et al.
patent: 5874785 (1999-02-01), Liu

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