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Application filed by Ilmari MattinenfiledCriticalIlmari Mattinen
Priority to FI1235/74ApriorityCriticalpatent/FI52922C/fi
Publication of FI123574A7publicationCriticalpatent/FI123574A7/fi
Publication of FI52922BpublicationCriticalpatent/FI52922B/fi
Application grantedgrantedCritical
Publication of FI52922CpublicationCriticalpatent/FI52922C/fi