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Priority claimed from DE3038022Aexternal-prioritypatent/DE3038022C2/de
Priority claimed from DE3038021Aexternal-prioritypatent/DE3038021C2/de
Application filed by Gema Bauelemente AgfiledCriticalGema Bauelemente Ag
Priority claimed from EP19810107637external-prioritypatent/EP0049433B1/de
Application grantedgrantedCritical
Publication of ATE10767T1publicationCriticalpatent/ATE10767T1/de