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Application filed by Viljo HirvonenfiledCriticalViljo Hirvonen
Priority to FI891727ApriorityCriticalpatent/FI83555C/fi
Publication of FI891727A0publicationCriticalpatent/FI891727A0/fi
Publication of FI891727ApublicationCriticalpatent/FI891727A/fi
Application grantedgrantedCritical
Publication of FI83555BpublicationCriticalpatent/FI83555B/fi
Publication of FI83555CpublicationCriticalpatent/FI83555C/fi