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Priority to FI895543ApriorityCriticalpatent/FI86906C/fi
Publication of FI895543A0publicationCriticalpatent/FI895543A0/fi
Priority to FI905714Aprioritypatent/FI88640C/fi
Publication of FI895543ApublicationCriticalpatent/FI895543A/fi
Application grantedgrantedCritical
Publication of FI86906BpublicationCriticalpatent/FI86906B/fi
Publication of FI86906CpublicationCriticalpatent/FI86906C/fi