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Application filed by Poltto Esko K, Heikki Tapani KoivikkofiledCriticalPoltto Esko K
Priority to FI66072ApriorityCriticalpatent/FI54240C/en
Publication of FI54240BpublicationCriticalpatent/FI54240B/en
Application grantedgrantedCritical
Publication of FI54240CpublicationCriticalpatent/FI54240C/en