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Application filed by Thure EkmanfiledCriticalThure Ekman
Priority to FI2136/74ApriorityCriticalpatent/FI60431C/fi
Publication of FI213674A7publicationCriticalpatent/FI213674A7/fi
Application grantedgrantedCritical
Publication of FI60431BpublicationCriticalpatent/FI60431B/fi
Publication of FI60431CpublicationCriticalpatent/FI60431C/fi