05223844 is referenced by 1168 patents and cites 6 patents.

The present invention provides a vehicle tracking and security system which allows immediate response in case of vehicle theft, an accident, vehicle breakdown, or other emergency. Guardian and tracking functions are provided through Mobile Units installed in hidden locations in vehicles to be monitored. The Mobile Units communicate with a Control Center. Preferably, the Mobile Unit provides vehicle theft and intrusion protection using an in-vehicle alarm and security system linked to the Control Center by a transceiver in the Mobile Unit. Also, a keypad or other human interface device is provided, allowing a vehicle driver or occupant to signal the Control Center that a particular type of assistance is needed. The vehicle's location may be automatically transmitted to the Control Center along with any automatic alarm signal or manually entered request, the location being precisely determinable anywhere in the world through use of Global Positioning System (GPS) information. The present invention provides continuous monitoring of a large number of vehicles for a broad range of status and emergency conditions over a virtually unlimited geographic area, also allowing manual communication of requests for assistance to that specific location. Advantageously, the system is implemented using existing commercial or police communications equipment.

Title
Vehicle tracking and security system
Application Number
7/870141
Publication Number
5223844
Application Date
April 17, 1992
Publication Date
June 29, 1993
Inventor
William M Riley
Dallas
TX, US
John P Mansell
Dallas
TX, US
Agent
Mason Fenwick & Lawrence
Assignee
Auto Trac
TX, US
IPC
G01S 5/02
H04B 7/185
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