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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.
personal intercoms for providing assisted communications for workers in hazardous or industrial environments, namely, personal intercom headsets, personal intercoms for head mounting, electrical distribution boxes, life safety rope with integral communication wiring, [ electrical power extension cords, ] electrical couplers to join communication wiring, amplifier and audio speaker/microphone assemblies; cases and carrying bags for carrying parts of personal intercoms for providing assisted communications for workers in hazardous or industrial environments