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Application filed by Murto Kalervo PetterssonfiledCriticalMurto Kalervo Pettersson
Priority to FI880378ApriorityCriticalpatent/FI81288C/fi
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Publication of FI880378ApublicationCriticalpatent/FI880378A/fi
Publication of FI81288BpublicationCriticalpatent/FI81288B/fi
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Publication of FI81288CpublicationCriticalpatent/FI81288C/fi