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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.
potentiometer adjustment dials for consumer products, namely, guitar amplifiers, electronic effect pedals for use with sound amplifiers, sound amplifiers, powered speakers, public address system heads, sound mixing boards, and towered speakers; potentiometer adjustment dials for electrical music apparatus, namely, sound amplifiers and loudspeakers, and for components and accessories for such electrical apparatus, namely, for electric foot pedal controls, amplifier knobs, and electric amplifier volume and tone controls