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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.
leak detecting device for use in conjunction with water supplied home appliances consisting of water sensor, control ball valve, electric actuated ball valve, brass ball valve and control unit with audible alarm; water control system consisting of electric water valve actuators, electronic display and control panel, motion sensitive switches, motion detectors, moisture sensors, and audible alarm