Method for protecting vehicles against unauthorized use

Details Method for protecting vehicles against unauthorized use Method for protecting vehicles against unauthorized use

1996-03-11

1999-03-09

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

180168, 180173, 307 105, G06F 704, B60T 716, B60T 3116, B60R 2504

Patent

active

058806792

ABSTRACT:
The invention relates to a method for protecting against unauthorized use of a vehicle which has bidirectional communication with a master station, whereby it is possible not only to transmit exclusively a position message of the vehicle to the master station or to transmit exclusively enabling signals to the vehicle from the master station, but also to make the communication appropriate to requirements. The necessary transmission of information is substantially reduced in that the enabling signal is broadcast only when requested by the vehicle. On the other hand, it is still not possible for the enabling to be carried out at the vehicle end only.

REFERENCES:
patent: 4636651 (1987-01-01), Kilgore
patent: 4740792 (1988-04-01), Sagey et al.
patent: 4805722 (1989-02-01), Keating et al.
patent: 4839640 (1989-06-01), Ozer et al.
patent: 5276728 (1994-01-01), Pagliaroli et al.
patent: 5519255 (1996-05-01), Burtch et al.
patent: 5557254 (1996-09-01), Johnson et al.
patent: 5686765 (1997-11-01), Washington

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