21 COMMUNICATION SYSTEMS, EQUIPMENT AND PARTS THEREOF, INCLUDING: TELEPHONIC, TELEGRAPHIC, VIDEO TELEPHONIC, FACSIMILE AND TELEPHOTOGRAPHY APPARATUS INCLUDING TRANSMITTING APPARATUS, RECEIVERS, AND TRANSMISSION SYSTEMS, BOTH WIRED AND WIRELESS; SWITCHBOARDS AND SELECTIVE SWITCHING APPARATUS; TRANSMITTERS OF ELECTRONICS SIGNALS; COMPONENTS AND PARTS FOR THE ABOVE, INCLUDING AMPLIFIERS, CONDENSERS, ELECTRIC CONVERTERS, INDUCTORS, PRINTED CIRCUITS, RECTIFIERS, RELAYS, RESISTANCES, SEMI-CONDUCTIVE DEVICES, STORAGE BATTERIES, SWITCHES, TRANSFORMERS, VACUUM TUBES; ELECTRIC WIRE AND CABLES, AND CONNECTIONS THERFOR