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Application filed by Viljo Emil KoskinenfiledCriticalViljo Emil Koskinen
Priority to FI840484ApriorityCriticalpatent/FI78430C/fi
Publication of FI840484A0publicationCriticalpatent/FI840484A0/fi
Publication of FI840484ApublicationCriticalpatent/FI840484A/fi
Application grantedgrantedCritical
Publication of FI78430BpublicationCriticalpatent/FI78430B/fi
Publication of FI78430CpublicationCriticalpatent/FI78430C/fi