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Priority claimed from DE1966V0019590external-prioritypatent/DE1144915B/de
Priority claimed from FI251367Aexternal-prioritypatent/FI47929C/fi
Application filed by Vorkauf HeinrichfiledCriticalVorkauf Heinrich
Publication of FI55578BpublicationCriticalpatent/FI55578B/fi
Application grantedgrantedCritical
Publication of FI55578CpublicationCriticalpatent/FI55578C/fi