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Application filed by Pekka Koivistoinen, Lasse VanhanenfiledCriticalPekka Koivistoinen
Priority to FI350970ApriorityCriticalpatent/FI48966C/fi
Priority to CA130,955Aprioritypatent/CA956174A/en
Publication of FI48966BpublicationCriticalpatent/FI48966B/fi
Application grantedgrantedCritical
Publication of FI48966CpublicationCriticalpatent/FI48966C/fi