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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.
electronic and battery-operated sensing and detecting equipment in the nature of stud finders, edge finders, center finders, and ac voltage detectors all for use in locating objects behind solid or opaque surfaces in the field of construction or home repair; electronic measuring devices in the nature of edge finders, and center finders; tools to locate objects behind solid or opaque surfaces, or within solid materials, in the nature of electronic stud finders; utility detectors in the nature of electrical current detectors; and embedded recorded computer software for sensing objects or materials obscured by a wall, ceiling, floor, or any solid or opaque surface in the nature of wall studs, rafters, joists, or other hidden construction members, circuits, edges, and center points and communicating the sensor results with the user, sold with some or all of the foregoing