75346860
Aug 26, 1997
Apr 27, 1999
communications hardware and software for communication signal processing and simulation, graphical user interface, and display of processed cellular signal data; for measuring and processing radio frequency characteristics of cellular telephone signals for detecting fraudulent cellular phone calls; for geographically locating cellular telephones and wireless emitters using wireless emitted signals; for measuring, processing, and displaying signals in the cellular band for monitoring the quality of the cellular network
Electrical and Scientific Apparatus