RADIO RECEIVING APPARATUS, RADIO TRANSMITTING APPARATUS, TELEVISION RECEIVING APPARATUS, SOUND RECORD PLAYING APPARATUS, CLOSED CIRCUIT TELEVISION SYSTEMS INCLUDING TELEVISION CAMERAS AND TRANSMITTERS AND CONTROL AND DISTRIBUTION EQUIPMENT USED THEREWITH, PHONOGRAPH PICKUP CARTRIDGES, WAVE SIGNAL ANTENNA APPARATUS, CAPACITORS, TRANSFORMERS, VIBRATORS FOR ELECTRIC APPARATUS, LOUDSPEAKERS, INDUCTORS AND COILS, CRYSTALS FOR ELECTRONIC APPARATUS, INTERFERENCE ELIMINATORS FOR RADIO AND TELEVISION APPARATUS, BATTERY CHARGERS, MICROPHONES, CAVITY RESONATORS, WAVEGUIDES, TELEPHONE HANDSETS, ELECTRIC POWER LINE COUPLERS, ELECTRIC POWER SUPPLIES FOR CONVERTING ALTERNATING CURRENT TO DIRECT CURRENT AND DIRECT CURRENT TO ALTERNATING CURRENT, INTERCOMMUNICATION EQUIPMENT FOR WIRED TWOWAY COMMUNICATIONS SYSTEMS, HOUSINGS FOR ELECTRICAL EQUIPMENT SUCH AS RECEIVERS AND TRANSMITTERS, PUBLIC ADDRESS SYSTEMS, GLASS FOR PROTECTING CATHODE RAY TUBE SCREENS, RESISTORS, ELECTRIC CONNECTOR SOCKETS, ELECTRIC WIRE AND CABLE, ELECTRIC CONNECTOR PLUGS, ELECTRIC TERMINAL STRIPS, ELECTRIC LIGHT BULBS, FUSES FOR ELECTRIC APPARATUS, ELECTRICAL FILTER UNITS SELECTIVELY RESPONSIVE TO CURRENTS OF DIFFERING FREQUENCY, MOTOR GENERATORS, LOUDSPEAKER GRILL CLOTH, ELECTRIC AUDIO TONE GENERATORS, ELECTRIC SWITCHES, RELAYS, ELECTRIC MOTORS, ELECTRON TUBES, ELECTRIC INSULATORS, SPARK PLATES FOR AUTO ELECTRIC EQUIPMENT, TUNING AND CONTROL MECHANISMS FOR ELECTRIC APPARATUS, EARPHONES, HEADSETS, REMOTE ALARM INDICATING SYSTEMS, REMOTE CONTROL SYSTEMS TO OPERATE GARAGE DOORS AND TELEVISION RECEIVERS, MICROWAVE CARRIER GENERATING AND RECEIVING APPARATUS, SUPERVISORY CONTROL EQUIPMENT, POWER LINE CARRIER EQUIPMENT, VOLTAGE REGULATORS, PLATED AND PRINTED CIRCUIT BOARDS OR PANELS, TRAFFIC LIGHT CONTROL EQUIPMENT INCLUDING PROGRAMMERS, CODERS, TRANSMITTERS, RECEIVERS AND DECODERS, AUDIO FREQUENCY AMPLIFIERS, BATTERIES, SEMICONDUCTOR MATERIAL AND DEVICES INCLUDING TRANSISTORS AND DIODES, AND CRYSTAL OVEN ASSEMBLIES