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Application filed by Risto Heikki PitkaenenfiledCriticalRisto Heikki Pitkaenen
Priority to FI100574ApriorityCriticalpatent/FI51801C/fi
Publication of FI100574ApublicationCriticalpatent/FI100574A/fi
Publication of FI51801BpublicationCriticalpatent/FI51801B/fi
Application grantedgrantedCritical
Publication of FI51801CpublicationCriticalpatent/FI51801C/fi