73083930
Apr 14, 1976
Jun 27, 1978
ELECTRIC POWER CONTROLS AND SEMICONDUCTOR COMPONENTS FOR CONSUMER, INDUSTRIAL AND COMMERCIAL APPLICATIONS IN WHICH A.C. OR D.C. POWER IS SWITCHED AND CONTROLLED, INCLUDING POWER CONTROLS FOR HOUSEHOLD APPLIANCES, FOR LIGHTING, HEATING, VENTILATING AND AIR CONDITIONING EQUIPMENT, FOR POWER HAND TOOLS AND FOR BUSINESS MACHINES
Electrical and Scientific Apparatus