9 scientific, navigation, surveying, electrical apparatus and instruments included within this class, namely, photographical, cinematographic film, optical, weighing, measuring, signal, control, rescue and education apparatus and instruments, namely, cameras, video cameras and recorders and replacement parts and accessories therefor, namely, batteries, optical lenses, tripods; sound recording and playback equipment, namely, apparatus for recording, transmitting and reproducing sound and images; record player, record changer, namely, device for changing and playing different records, tape recorder, cassette recorder, stereophonic apparatus and assemblies produced thereof, namely, stereo receivers, stereo tuners, stereo amplifiers, stereo speakers, transmitters, namely, transmitters of electronic signals; electro-acoustic amplifier, loudspeaker, audio-video receiver, video tape recorder, microphones, audio mixer, audio electric control panels, battery chargers, electric cables and electric plugs, digital video mixers, electric video control panel, and replacement parts and accessories therefor, namely, headphones, earphones, cassette adapters and video and cassette tape winders, microphones, speakers, mounting devices and swivel bases especially adapted for computer and television monitors, radio and television aerials, socket extension cords, timers, adapters; video cases, namely, cases and protective covers for audio-visual equipment, namely, cases for cameras, cases for video recorders, cases for MP3 players, CD cases, DVD cases, cases for video diskettes and compact video disks; optical filter, optical lenses for photographic and video equipment, intercommunication systems, namely, communications computers, communications headsets for use with communication radios, intercom systems, video monitoring systems or other communications network transceivers, communication software for connecting computer network users, stereophonic amplifying apparatus and electro-acoustic multi-channel amplifying apparatus, namely, amplifiers, audio amplifiers, amplifier for wireless communications, monitor signal amplifiers, camcorder batteries, telephones, satellite systems, namely, satellite navigational systems, namely, a global positioning system, satellite dishes for satellite transmissions, satellite radios as well as electric, coaxial input and output cables for such systems