73072981
Dec 29, 1975
Sep 20, 1977
TELEPHONE PROTECTION EQUIPMENTNAMELY, STATION PROTECTORS, CONVERSION KITS USED WITH STATION PROTECTORS, REPLACEMENT ARRESTERS AND THREE ELECTRODE GAS TUBE ARRESTERS, ALL FOR USE IN PROTECTING TELEPHONE EQUIPMENT AND CONDUCTORS FROM HIGH ELECTRICAL VOLTAGES AND SURGE CURRENTS
Electrical and Scientific Apparatus