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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.
apparatus for transmitting and receiving coded data over telegraph or audio channels-namely, signal transmitting stations with telephone equipment and converters for translating tape-carried code signals into audio-frequency signals, signal receiving stations with telephone equipment and converters for translating audio-frequency signals into code-signals, tape punching and tape recording devices for coded data, tape reading devices, devices for automatic detection and correction of signal errors, data processing circuit device with data memory units, and components of said stations and devices