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Individual
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Individual
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Priority to ES126704ApriorityCriticalpatent/ES126704A1/es
Publication of ES126704A1publicationCriticalpatent/ES126704A1/es
ES126704A1932-05-191932-05-19Un procedimiento para preparar negativas o positivas, especialmente negativas parciales para reproducción polícroma.
ExpiredES126704A1
(es)