Location position information of a mobile device utilizing Wi-Fi, FM, AM, television transmissions(s), other radio transmission(s), electromagnetic, acoustic, or other signals received from base stations or access points. The position information can be provided through a Web service and/or locally on...http://www.google.com.au/patents/US7738884?utm_source=gb-gplus-sharePatent US7738884 - Positioning service utilizing existing radio base stations
