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Priority claimed from DE19803006371external-prioritypatent/DE3006371A1/de
Priority claimed from DE19803041193external-prioritypatent/DE3041193A1/de
Application filed by Duewag AktiengesellschaftfiledCriticalDuewag Aktiengesellschaft
Priority claimed from EP81100600Aexternal-prioritypatent/EP0034717B1/de
Application grantedgrantedCritical
Publication of ATE4634T1publicationCriticalpatent/ATE4634T1/de