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Priority to FI902303ApriorityCriticalpatent/FI88416C/fi
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Publication of FI902303ApublicationCriticalpatent/FI902303A/fi
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Publication of FI88416BpublicationCriticalpatent/FI88416B/fi
Publication of FI88416CpublicationCriticalpatent/FI88416C/fi