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Publication of FR816420ApublicationCriticalpatent/FR816420A/fr
B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
FR816420D1936-01-181937-01-16Machine pour l'impression en toutes couleurs et suivant tous procédés mécaniques ou photomécaniques d'impression
ExpiredFR816420A
(fr)
Perfectionnements aux procédés pour produire des planches ou clichés pour l'héliogravure à partir de planches ou clichés en demi-teinte ou similigravure