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Priority to FI863748ApriorityCriticalpatent/FI76685C/sv
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Publication of FI863748ApublicationCriticalpatent/FI863748A/fi
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Publication of FI76685BpublicationCriticalpatent/FI76685B/fi
Publication of FI76685CpublicationCriticalpatent/FI76685C/sv