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Application filed by Veikko LiukkonenfiledCriticalVeikko Liukkonen
Priority to FI780115ApriorityCriticalpatent/FI57165C/en
Publication of FI780115ApublicationCriticalpatent/FI780115A/en
Application grantedgrantedCritical
Publication of FI57165BpublicationCriticalpatent/FI57165B/en
Publication of FI57165CpublicationCriticalpatent/FI57165C/en