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Priority to FI915512ApriorityCriticalpatent/FI90591C/fi
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Publication of FI915512ApublicationCriticalpatent/FI915512A/fi
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Publication of FI90591BpublicationCriticalpatent/FI90591B/fi
Publication of FI90591CpublicationCriticalpatent/FI90591C/fi