A system for providing position-related information to a mobile user includes a mobile unit and a central site server. The mobile unit includes circuitry for determining present position information from position signals which may emanate from, for example, GPS satellites. The mobile unit further includes...http://www.google.com/patents/US7286837?utm_source=gb-gplus-sharePatent US7286837 - Method and apparatus for providing position-related information to mobile recipients
