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Priority claimed from FR808895Aexternal-prioritypatent/FR1248097A/fr
Priority claimed from FR834410Aexternal-prioritypatent/FR78208E/fr
Application filed by Giraud Provost & Co EtsfiledCriticalGiraud Provost & Co Ets
Publication of BE596140ApublicationCriticalpatent/BE596140A/fr