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Priority claimed from FR8104250Aexternal-prioritypatent/FR2500424B1/en
Priority claimed from FR8121427Aexternal-prioritypatent/FR2516064A2/en
Application filed by Charlet S AfiledCriticalCharlet S A
Priority claimed from EP19810420194external-prioritypatent/EP0058810B1/en
Application grantedgrantedCritical
Publication of ATE12759T1publicationCriticalpatent/ATE12759T1/en