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Application filed by Vilho Ilmari HinkkanenfiledCriticalVilho Ilmari Hinkkanen
Priority to FI883539ApriorityCriticalpatent/FI883539A/fi
Publication of FI883539A0publicationCriticalpatent/FI883539A0/fi
Publication of FI883539ApublicationCriticalpatent/FI883539A/fi