73093879
Jul 19, 1976
Aug 15, 1978
TELEPHONE PROTECTION EQUIPMENT-NAMELY, STATION PROTECTORS, CONVERSION KITS USED IN MODIFYING STATION PROTECTORS, TO PROVIDE A METALLIC FAILSAFE FUNCTION, REPLACEMENT ARRESTERS AND TWO ELECTRODE GAS TUBE ARRESTERS, ALL FOR USE IN PROTECTING TELEPHONE EQUIPMENT AND/OR CONDUCTORS FROM HIGH ELECTRICAL VOLTAGES AND/OR SURGE CURRENTS
Electrical and Scientific Apparatus