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Application filed by Aarno Kalervo PerhofiledCriticalAarno Kalervo Perho
Priority to FI750164ApriorityCriticalpatent/FI54193C/en
Publication of FI750164ApublicationCriticalpatent/FI750164A/fi
Application grantedgrantedCritical
Publication of FI54193BpublicationCriticalpatent/FI54193B/en
Publication of FI54193CpublicationCriticalpatent/FI54193C/en