Sound reproducing apparatus; amplifiers; magnetostrictive drive units for sound reproduction devices; loudspeaker products; all for use with architectural windows

Scientific, nautical, surveying, electric, photographic, cinematographic, optical, weighting, measuring, signalling, checking (supervision), live-saving and teaching apparatus and instrument; apparatus and instruments for conducting switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images, audio information apparatus which transmits sound via windows of the interior of buildings (including retail outlets, residential buildings, office complexes and restaurants), vehicles or encased billboards to the exterior, speakers; 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