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Publication of FR597983ApublicationCriticalpatent/FR597983A/fr
D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F1/00—Wet end of machines for making continuous webs of paper
D21F1/44—Watermarking devices
FR597983D1925-05-121925-05-12Procédé de filigranage sur machine de tous papiers, cartons et, en général, de tous produits à base de cellulose
ExpiredFR597983A
(fr)