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Publication date
Priority claimed from DE3643916Aexternal-prioritypatent/DE3643916C1/de
Priority claimed from DE19863643917external-prioritypatent/DE3643917A1/de
Priority claimed from DE19863643918external-prioritypatent/DE3643918A1/de
Priority claimed from DE3643919Aexternal-prioritypatent/DE3643919C1/de
Application filed by Bergwerksverband GmbhfiledCriticalBergwerksverband Gmbh
Priority claimed from EP87118829Aexternal-prioritypatent/EP0275514B1/de
Application grantedgrantedCritical
Publication of ATE74615T1publicationCriticalpatent/ATE74615T1/de