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Application filed by William Gordon LoudenfiledCriticalWilliam Gordon Louden
Priority to FI763012ApriorityCriticalpatent/FI61220C/fi
Publication of FI763012ApublicationCriticalpatent/FI763012A/fi
Publication of FI61220BpublicationCriticalpatent/FI61220B/fi
Application grantedgrantedCritical
Publication of FI61220CpublicationCriticalpatent/FI61220C/fi