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Priority claimed from FI711656Aexternal-prioritypatent/FI47309C/en
Priority claimed from FI248471Aexternal-prioritypatent/FI47150C/en
Application filed by Yrjo SuominenfiledCriticalYrjo Suominen
Publication of ATA507372ApublicationCriticalpatent/ATA507372A/en
Application grantedgrantedCritical
Publication of AT328373BpublicationCriticalpatent/AT328373B/en