73057671
Jul 14, 1975
Oct 12, 1976
ELECTRONIC EQUIPMENT USED PRIMARILY IN THE SWITCHING AND VOICE FREQUENCY TRANSMISSION AREAS OF TELECOMMUNICATIONS, INCLUDING, BUT NOT LIMITED TO, LINE AMPLIFIERS, EQUALIZERS, TERMINATING SETS, ECHO SUPPESSORS, DATA TERMINATION EQUIPMENT, SIGNALING EQUIPMENT, BRIDGES, PROGRAM AMPLIFIERS, TRUNKS, POWER EQUIPMENT AND MOUNTING SHELVES
Electrical and Scientific Apparatus