BXB

Data processing apparatus; computer peripherals; radios; intercommunication apparatus; light communication apparatus; network communication apparatus; video telephones; loudspeakers; audio-receivers; video-receivers; megaphones; microphones; sound recording apparatus; sound transmitting apparatus; acoustic-couplers; conference systems, namely, conference system main control units, table-top microphone units equipped with LCD, flush-mounted microphone units, graphical control software; public address systems, namely, public-address control units, public-address system servers, public-address system intercom modules, remote decoders, professional servers with control software, speaker circuit zone selectors, audio source extend switchers, emergency broadcasting systems; images systems, namely, images system cameras, images system camera controllers, images system image processors, conference image processors; educational apparatus, namely, languages learning systems consisting primarily of graphical control software, student learning control units, headsets and MP3 players/recorders; speakers; amplifiers; control units, namely, conference system sequence power control units, public-address system sequence power control units