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Priority to FI863939ApriorityCriticalpatent/FI76111C/fi
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Publication of FI863939ApublicationCriticalpatent/FI863939A/fi
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Publication of FI76111BpublicationCriticalpatent/FI76111B/fi
Publication of FI76111CpublicationCriticalpatent/FI76111C/fi