21 TELEVISION ANTENNAS, CABLES, COUPLERS, AND AMPLIFIERS; HIGH FIDELITY TUNERS, AMPLIFIERS, SPEAKERS, MICROPHONES AND EARPHONES; RADIOS AND PARTS THEREOF; TELEVISION PICTURE TUBES, RADIO AND TELEVISION TRANSMITTING AND RECEIVING TUBES, COMPUTER TUBES, SOCKET TUBE ADAPTORS, IGNITRONS, TRANSFORMERS, INVERTERS, RECTIFIERS, RELAYS, SOLENOIDS, RESISTORS, NOISE FILTERS, SWITCHES, CIRCUIT BREAKERS, FUSES, FUSE MOUNTING BASES, CAPACITORS, PHEOSTATS, CONVERTERS, FLASHLIGHT BATTERIES, BATTERY CHARGERS, ELECTRIC MOTORS AND PHOTOELECTRIC CONTROLS; ELECTRIC WIRE, EXTENSION CORDS, CABLE, CLIPS, PLUGS, JACKS, SOCKETS, BINDING POSTS AND TERMINAL BOARDS, TELEPHONE EXTENSION CORDS, PLUGS AND JACKS; INSULATORS, INSULATING MATERIALS-NAMELY, ELECTRIC INSULATORS COMPOSED OF GLASS, PORCELAIN AND PLASTIC, AND ELECTRIC TAPES, INDICATOR AND SIGNAL LIGHT UNIT; AND ENCLOSURES FOR SPEAKERS, AMPLIFIERS AND OTHER ELECTRICAL EQUIPMENT