73428098
May 31, 1983
TELECOMMUNICATIONS TEST EQUIPMENT, NAMELY: DUAL-TONE MULTI-FREQUENCEY (DTMF) ANALYZER; DUAL-TONE MULTI-FREQUENCY TEST SET; DUAL-TONE DECODING TEST SET; DUAL-TONE MULTI-FREQUENCY INTERFACE FOR STD BUS MICROPROCESSOR SYSTEMS; AND, TELEPHONE INSTRUMENTS TEST SET
Electrical and Scientific Apparatus