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Application filed by Frank Otto SilvanderfiledCriticalFrank Otto Silvander
Priority to FI761559ApriorityCriticalpatent/FI61539C/fi
Publication of FI761559A7publicationCriticalpatent/FI761559A7/fi
Application grantedgrantedCritical
Publication of FI61539BpublicationCriticalpatent/FI61539B/fi
Publication of FI61539CpublicationCriticalpatent/FI61539C/fi