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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
voice modification and amplification system consisting of headset microphones, digital processor and amplifier unit, 12 volt rechargeable battery packs, battery chargers, enclosed loudspeakers, three cartridge pouches, retractile cable connecting cords and clothing belts, sold as a unit for use by walk-around costume operators