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Application filed by Petersson Bengt OloffiledCriticalPetersson Bengt Olof
Priority to FI2928/74ApriorityCriticalpatent/FI58064C/fi
Publication of FI292874A7publicationCriticalpatent/FI292874A7/fi
Publication of FI58064BpublicationCriticalpatent/FI58064B/fi
Application grantedgrantedCritical
Publication of FI58064CpublicationCriticalpatent/FI58064C/fi