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Priority claimed from DE2440701Aexternal-prioritypatent/DE2440701C3/de
Application filed by Schwank GmbhfiledCriticalSchwank Gmbh
Publication of FI803676LpublicationCriticalpatent/FI803676L/fi
Application grantedgrantedCritical
Publication of FI61088BpublicationCriticalpatent/FI61088B/fi
Publication of FI61088CpublicationCriticalpatent/FI61088C/fi