The system includes a rescue requester device including an urgent rescue key for a requester's urgent situation, a communication company server configured to receive an urgent situation from the rescue requester device and establish a call between the rescue requester device and a rescuer device, and...http://www.google.de/patents/US8175572?utm_source=gb-gplus-sharePatent US8175572 - Urgent call misappropriation prevention system and method using wireless communications
