A system automatically discovers and maintains geographic location information for entities and devices making up a computer network. The system preferably includes a computing unit and a geographic location generator, such as a Global Positioning System (GPS) receiver. The computing unit includes a...http://www.google.de/patents/US7194354?utm_source=gb-gplus-sharePatent US7194354 - System for discovering and maintaining geographic location information in a computer network to enable emergency services
