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Priority claimed from FR58000540Aexternal-prioritypatent/FR1307918A/fr
Priority claimed from FR58000542Aexternal-prioritypatent/FR1341488A/fr
Priority claimed from FR58000544Aexternal-prioritypatent/FR1370572A/fr
Application filed by Louis Joseph CharpenetfiledCriticalLouis Joseph Charpenet
Publication of BE616149ApublicationCriticalpatent/BE616149A/fr