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Publication of FR720134ApublicationCriticalpatent/FR720134A/fr
B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
B41L19/00—Duplicating or printing apparatus or machines for office or other commercial purposes, of special types or for particular purposes and not otherwise provided for
FR720134D1930-07-171931-07-17Procédé de tirage sur feuilles neutres d'originaux susceptibles de donner des copies
ExpiredFR720134A
(fr)
Perfectionnements aux procédés pour produire des planches ou clichés pour l'héliogravure à partir de planches ou clichés en demi-teinte ou similigravure