73004434
Oct 24, 1973
Feb 11, 1975
ELECTRONIC COMMUNICATIONS-SYSTEMS COMPRISING TRANSMITTERS, RECEIVERS, MODULATORS, DE-MODULATORS, CONTROL PANELS, INTERFACE PANELS, SIGNAL AND DATA PROCESSORS, RECORDERS, SIMULATORS, ANTENNAS, TRANSMISSION LINE ELEMENTS AND PARTS, REPLACEMENT PARTS, AND SUBASSEMBLIES THEREFOR, AND SIGNAL SIMULATORS AND SIGNAL MEASUREMENT APPARATUS FOR SAID SYSTEMS
Electrical and Scientific Apparatus