74478440
Jan 11, 1994
global positioning system, namely a satellite signal receiver coupled with a processor, two serial interfaces, one parallel interface, one optional keypad and one optional LCD (liquid crystal display) display; geographic information system, namely data management software that exploits geographic/geodesic information, geometric map projections, and graphical transformations; satellite guiding system comprising the above mentioned global positioning system and the above mentioned geographic information system; satellite signal receiver; wireless phones; cellular phones; fiber optic transceiver; satellite communication processor
Electrical and Scientific Apparatus