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Application filed by Aarne Ilmari PursiainenfiledCriticalAarne Ilmari Pursiainen
Priority to FI761613ApriorityCriticalpatent/FI54542C/fi
Publication of FI761613A7publicationCriticalpatent/FI761613A7/fi
Application grantedgrantedCritical
Publication of FI54542BpublicationCriticalpatent/FI54542B/fi
Publication of FI54542CpublicationCriticalpatent/FI54542C/fi