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Priority claimed from DE19712114863external-prioritypatent/DE2114863C/en
Priority claimed from DK140072Aexternal-prioritypatent/DK138706C/en
Application filed by Dyckerhoff & Widmann AgfiledCriticalDyckerhoff & Widmann Ag
Publication of DK369975ApublicationCriticalpatent/DK369975A/da
Publication of DK142883BpublicationCriticalpatent/DK142883B/en
Application grantedgrantedCritical
Publication of DK142883CpublicationCriticalpatent/DK142883C/en