A method for locating an entity attached to a locator device. The method comprises of receiving, at the locator device, a message over a cellular network; and responsive to receiving the message, automatically initiating a call over the cellular network to enable a party answering the call to determine...http://www.google.ca/patents/US8180319?utm_source=gb-gplus-sharePatent US8180319 - Remotely activatable locator system and method
