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Priority claimed from FI834438Aexternal-prioritypatent/FI76405C/fi
Application filed by Ilkka T Arvola, Jaakko KajamaafiledCriticalIlkka T Arvola
Publication of IT8467592A0publicationCriticalpatent/IT8467592A0/it
Publication of IT8467592A1publicationCriticalpatent/IT8467592A1/it
Application grantedgrantedCritical
Publication of IT1179715BpublicationCriticalpatent/IT1179715B/it