Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valtion TeknillinenfiledCriticalValtion Teknillinen
Priority to FI891830ApriorityCriticalpatent/FI81747C/fi
Publication of FI891830A0publicationCriticalpatent/FI891830A0/fi
Application grantedgrantedCritical
Publication of FI891830ApublicationCriticalpatent/FI891830A/fi
Publication of FI81747BpublicationCriticalpatent/FI81747B/fi
Publication of FI81747CpublicationCriticalpatent/FI81747C/fi