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Application filed by Aarre Armas OjalafiledCriticalAarre Armas Ojala
Priority to FI871658ApriorityCriticalpatent/FI77818C/fi
Publication of FI871658A0publicationCriticalpatent/FI871658A0/fi
Publication of FI871658ApublicationCriticalpatent/FI871658A/fi
Application grantedgrantedCritical
Publication of FI77818BpublicationCriticalpatent/FI77818B/fi
Publication of FI77818CpublicationCriticalpatent/FI77818C/fi