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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.
over-voltage and over-current power line protectors, protectors assemblies, and structural parts thereof; wireless and wireline co-axial over-voltage protectors, protector assemblies, and structural parts thereof; data line over-voltage protectors, protector assemblies and structural parts thereof; telephone line over-voltage protectors, protector assemblies, and structural parts thereof; over-voltage gas tube protectors and related apparatus, namely, surge arrester tubes, station protectors, protector assemblies, surge protectors, and gas tube arresters; electronic communications testing units to test telephone loops, telephone trunks, pair gain systems, pair gain loops, data circuits, cellular radio circuits, satellite circuits, and analog and digital transmission facilities, modular components for telecommunications systems, namely, splice trays, splice shelves, patch panels and splice closures for mounting, routing and storing fiber optics cables; time release remote loop disconnect for use in remotely disconnecting communication and electronic instruments; latching remote loop disconnect with automatic reset for use in remotely disconnecting communication and electronic instruments; unit for providing continuous balanced or momentary ground resistance and isolating ringers from ground during active mode of communication