Audio and video receivers; cabinets for loudspeakers; radios; television sets; television monitors; television antennas; television transmitters of electronic signals; telecommunication optical fiber cables used for transmission of television signals; optical communications instruments and components, namely, optical transmitters, optical receivers, optical transceivers and optical data links; telecommunication radio transmitters; telephone apparatus; facsimile machines; telegraphs; luminous signs for road traffic; videotape recorders, loudspeakers