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Priority claimed from DE19863603909external-prioritypatent/DE3603909A1/de
Priority claimed from DE19873702815external-prioritypatent/DE3702815A1/de
Application filed by Frenzelit Werke Gmbh & Co KgfiledCriticalFrenzelit Werke Gmbh & Co Kg
Priority claimed from EP87101516Aexternal-prioritypatent/EP0236735B1/de
Application grantedgrantedCritical
Publication of ATE43566T1publicationCriticalpatent/ATE43566T1/de