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Application filed by Valto Olavi ParviainenfiledCriticalValto Olavi Parviainen
Priority to FI333874ApriorityCriticalpatent/FI52047C/fi
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Publication of FI52047BpublicationCriticalpatent/FI52047B/fi
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Publication of FI52047CpublicationCriticalpatent/FI52047C/fi