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Priority claimed from FR8717535Aexternal-prioritypatent/FR2624445B1/fr
Priority claimed from FR8814480Aexternal-prioritypatent/FR2638414A1/fr
Application filed by BretcofiledCriticalBretco
Priority claimed from EP88430031Aexternal-prioritypatent/EP0320420B1/de
Application grantedgrantedCritical
Publication of ATE75674T1publicationCriticalpatent/ATE75674T1/de