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Priority claimed from FR8008102Aexternal-prioritypatent/FR2479965A1/fr
Priority claimed from FR8106352Aexternal-prioritypatent/FR2502321A2/fr
Application filed by Gex-Dumez S.A. Soiciete AnonymefiledCriticalGex-Dumez S.A. Soiciete Anonyme
Priority claimed from EP19810420049external-prioritypatent/EP0037791B1/de
Application grantedgrantedCritical
Publication of ATE8934T1publicationCriticalpatent/ATE8934T1/de