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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.
audio signal processing apparatus, namely, electronic phasing simulators, tone synthesizers, fuzz tone or signal distortion apparatus, octave dividers, sound compressors, switching unit for removing low amplitude signals, and noise filters, tone controllers, digital and analog delay units, and power supplies therefor