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Priority to FI914397ApriorityCriticalpatent/FI89610C/fi
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Publication of FI914397ApublicationCriticalpatent/FI914397A/fi
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Publication of FI89610BpublicationCriticalpatent/FI89610B/fi
Publication of FI89610CpublicationCriticalpatent/FI89610C/fi