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Priority claimed from FI760451Aexternal-prioritypatent/FI52926C/fi
Application filed by Kopal OyfiledCriticalKopal Oy
Priority to FI762770ApriorityCriticalpatent/FI53399C/fi
Publication of FI762770ApublicationCriticalpatent/FI762770A/fi
Application grantedgrantedCritical
Publication of FI53399BpublicationCriticalpatent/FI53399B/fi
Publication of FI53399CpublicationCriticalpatent/FI53399C/fi