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Un procedimiento industrial para obtener el fotograbado litográfico y el fotocromo litográfico tricolor, con aplicación a todos los trabajos que comprende la industria litográfica.
Un aparato para que varias personas al mismo tiempo puedan ver y observar con suma facilidad y prontitud y precisión por medio de telescopios y anteojos los astros y los objetos de la tierra denominado aparato astronómico para observatorios públicos.