73577045
Jan 10, 1986
Aug 12, 1986
ELECTRONIC COMPUTER TELEMETERING AND DATA ACQUISITION EQUIPMENT-NAMELY ANALOG TO DIGITAL CONVERTERS, DATA MEMORY CIRCUITS, DATA CENTRAL PROCESSING CIRCUITS, PARALLEL TO SERIAL AND SERIAL TO PARALLEL, DATA CONVERTERS, FREQUENCY SHIFT DATA MODULATORS AND DEMODULATORS, TELEPHONE LINE DATA COUPLERS, TELEPHONE LINE ACTIVE TRANSFORMERS
Electrical and Scientific Apparatus