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Priority claimed from FI268871Aexternal-prioritypatent/FI47839C/fi
Application filed by Vilho A TorvinenfiledCriticalVilho A Torvinen
Priority to FI301372ApriorityCriticalpatent/FI48970C/fi
Publication of FI48970BpublicationCriticalpatent/FI48970B/fi
Application grantedgrantedCritical
Publication of FI48970CpublicationCriticalpatent/FI48970C/fi