71417889
Apr 5, 1939
Nov 28, 1939
Active Trademark
ELECTRIC APPARATUS FOR VARYING THE CURRENT INTENSITY IN A CONTROLLED CIRCUIT, DEPENDENT UPON VARIATIONS OF RADIANT ENERGY AFFECTING A CONTROLLED CIRCUIT, SAID APPARATUS ADAPTED FOR USE WITH INDUSTRIAL EQUIPMENT INCLUDING SIGNALS SAFETY APPLIANCES, COUNTERS, COMBUSTION SUPERVISORS, AUTOMATIC MOVEMENTS OR CONTROLS
Housewares and Glass