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Individual
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Individual
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Priority to ES137880ApriorityCriticalpatent/ES137880A1/es
Publication of ES137880A1publicationCriticalpatent/ES137880A1/es
ES137880A1935-03-301935-03-30Mejoras introducidas en el procedimiento de obtención de fotografías rápidas a base de negativo opaco.
ExpiredES137880A1
(es)