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Application filed by Oiva Antero PesonenfiledCriticalOiva Antero Pesonen
Priority to FI880019ApriorityCriticalpatent/FI79823C/fi
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Publication of FI79823BpublicationCriticalpatent/FI79823B/fi
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Publication of FI79823CpublicationCriticalpatent/FI79823C/fi