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Application filed by Nils Johannes BaecklundfiledCriticalNils Johannes Baecklund
Priority to FI802274ApriorityCriticalpatent/FI71618C/sv
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Publication of FI71618BpublicationCriticalpatent/FI71618B/fi
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Publication of FI71618CpublicationCriticalpatent/FI71618C/sv