A vehicle tracking system includes a vehicle tracking unit and a monitoring station communicating therewith. The vehicle tracking unit may include a vehicle position determining device, a wireless communications device, and a controller connected to the wireless communications device and the vehicle...http://www.google.es/patents/US6522267?utm_source=gb-gplus-sharePatente US6522267 - Vehicle tracker conserving codes and related methods
Vehicle tracker conserving codes and related methods
