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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.
sound capture, generation, amplification and reproduction systems for use in public address, mass notification, intercom, hailing and warning, and intent determination applications, namely, acoustic transducers, amplifiers, microphones, and acoustic signal generators and processors adapted to those purposes