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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.
room acoustics enhancement system, namely, a system comprised of loudspeakers, microphones, signal processors and electric control panels for enhancing the reverberation of a room; electronic equipment directed to acoustic simulation used in conjunction with large performance venues, in particular, auditoriums, performing art centers, and theaters, namely, microphones, preamplifiers, equalizers being audio apparatus, digital audio sound processors, amplifiers, and speakers