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Priority to FI821995ApriorityCriticalpatent/FI75891C/en
Publication of FI821995A0publicationCriticalpatent/FI821995A0/en
Priority to CA000429166Aprioritypatent/CA1233057A/en
Publication of FI821995LpublicationCriticalpatent/FI821995L/en
Publication of FI75891BpublicationCriticalpatent/FI75891B/en
Application grantedgrantedCritical
Publication of FI75891CpublicationCriticalpatent/FI75891C/en