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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.
antenna and microwave instruments and systems and parts thereof, comprising, electronic recording instruments for producing a written record of electrical signals, radiation distribution printers for producing typewritten readouts of radiation signal strength as a function of position of radiation detecting antennas, punched paper tape recorders for producing binary coded punched tape, tape recorders for reading binary coded punched tape, antenna pattern integrators, electronic test sets for evaluating the performance of graphic recorders, radio microwave signal receivers, remote controlled electronic signal sources, antenna positioners, antenna tower carts, positioner controls, antenna reflectors, antenna tracking feeds, coax to waveguide adapters, d.c. blocking rf couplings, microwave standard gain horns, standard gain dipoles, log periodic antennas for the head end of a catv system, antenna patten display, electronic instrument enclosures, and servo-controlled radar tracking systems