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Priority claimed from FR780073Aexternal-prioritypatent/FR1217720A/fr
Priority claimed from FR791761Aexternal-prioritypatent/FR75549E/fr
Application filed by Louis Abeylard Jean BienfaitfiledCriticalLouis Abeylard Jean Bienfait
Publication of BE584448ApublicationCriticalpatent/BE584448A/fr