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Application filed by Sauvo PulkkinenfiledCriticalSauvo Pulkkinen
Priority to FI890200ApriorityCriticalpatent/FI81867C/fi
Publication of FI890200A0publicationCriticalpatent/FI890200A0/fi
Publication of FI890200ApublicationCriticalpatent/FI890200A/fi
Publication of FI81867BpublicationCriticalpatent/FI81867B/fi
Application grantedgrantedCritical
Publication of FI81867CpublicationCriticalpatent/FI81867C/fi