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Priority claimed from DE2061027Aexternal-prioritypatent/DE2061027C3/de
Application filed by Wilhelm HeglerfiledCriticalWilhelm Hegler
Publication of FI753313ApublicationCriticalpatent/FI753313A/fi
Application grantedgrantedCritical
Publication of FI54775BpublicationCriticalpatent/FI54775B/fi
Publication of FI54775CpublicationCriticalpatent/FI54775C/fi