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apparatus for recording, transmission or reproduction of sound or images | |
patents. | aparatos para el registro, transmisión, reproducción de sonido o imágenes |
scientific, nautical, surveying, electric, photographic, cinematographic, optical, weighing, measuring, signalling, checking , life-saving and teaching apparatus and instruments, apparatus for recording, transmission or reproduction of sound or images : 7 phrases in 1 subject |
Patents | 7 |