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Application filed by Esko Kalevi VaskefiledCriticalEsko Kalevi Vaske
Priority to FI811890ApriorityCriticalpatent/FI64788C/en
Publication of FI811890LpublicationCriticalpatent/FI811890L/en
Application grantedgrantedCritical
Publication of FI64788BpublicationCriticalpatent/FI64788B/en
Publication of FI64788CpublicationCriticalpatent/FI64788C/en