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Priority to FI892922ApriorityCriticalpatent/FI83119C/fi
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Publication of FI892922ApublicationCriticalpatent/FI892922A/fi
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Publication of FI83119BpublicationCriticalpatent/FI83119B/fi
Publication of FI83119CpublicationCriticalpatent/FI83119C/fi