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Priority to FI892593ApriorityCriticalpatent/FI83452C/fi
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Publication of FI892593ApublicationCriticalpatent/FI892593A/fi
Application grantedgrantedCritical
Publication of FI83452BpublicationCriticalpatent/FI83452B/fi
Publication of FI83452CpublicationCriticalpatent/FI83452C/fi