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Application filed by Goesta Jakob Ehnholm, Tapio Olavi WiikfiledCriticalGoesta Jakob Ehnholm
Priority to FI319273ApriorityCriticalpatent/FI55094C/fi
Publication of FI319273ApublicationCriticalpatent/FI319273A/fi
Application grantedgrantedCritical
Publication of FI55094BpublicationCriticalpatent/FI55094B/fi
Publication of FI55094CpublicationCriticalpatent/FI55094C/fi