Patent 7830309 was granted and assigned to Ubisense Limited on November, 2010 by the United States Patent and Trademark Office.
A portable location device for use in a location system, the device comprising a transmitter for transmitting ultra-wideband signals, a receiver for receiving non-ultra-wideband signals and a control unit coupled to the receiver for controlling the operation of the device in dependence on the received non-ultra-wideband signals.