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Application filed by Pentti Kullervo SewonfiledCriticalPentti Kullervo Sewon
Priority to FI892975ApriorityCriticalpatent/FI83587C/fi
Publication of FI892975A0publicationCriticalpatent/FI892975A0/fi
Publication of FI892975ApublicationCriticalpatent/FI892975A/fi
Application grantedgrantedCritical
Publication of FI83587BpublicationCriticalpatent/FI83587B/fi
Publication of FI83587CpublicationCriticalpatent/FI83587C/fi