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Application filed by Veikko Armas ParviainenfiledCriticalVeikko Armas Parviainen
Priority to FI844661ApriorityCriticalpatent/FI75632C/fi
Publication of FI844661A0publicationCriticalpatent/FI844661A0/fi
Publication of FI844661LpublicationCriticalpatent/FI844661L/fi
Publication of FI75632BpublicationCriticalpatent/FI75632B/fi
Application grantedgrantedCritical
Publication of FI75632CpublicationCriticalpatent/FI75632C/fi