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Priority claimed from DE8701983Uexternal-prioritypatent/DE8701983U1/de
Priority claimed from DE8709168Uexternal-prioritypatent/DE8709168U1/de
Application filed by Helmut DaubfiledCriticalHelmut Daub
Priority claimed from EP87115424Aexternal-prioritypatent/EP0278055B1/de
Application grantedgrantedCritical
Publication of ATE76256T1publicationCriticalpatent/ATE76256T1/de