85321221
May 15, 2011
Apr 2, 2013
Terrestrially based navigation system incorporating co-located pseudolite transmitters, electronic position-signal receivers and electronic position-signal transmitters for broadcasting position-fixing signals for location and navigation; navigation and positioning equipment, namely, pseudolite transmitters, electronic position-signal receivers and electronic position-signal transmitters; computer hardware configured to control pseudolite transmitters, electronic position-signal receivers and electronic position-signal transmitters; computer software which determines precise positioning from information contained in broadcast position-fixing signals; computerized hardware and software used to calculate the geographic location of movable objects including aircraft, marine vessels, land vehicles, human beings, animals, robots, cargo and packages; instruments comprising pseudolite transmitters, electronic position-signal receivers, electronic position-signal transmitters, and computerized hard ware and software used to determine position in land and marine surveying, mapping, tracking and navigation, and tracking and navigation of inanimate and animate objects
Electrical and Scientific Apparatus