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Application filed by Aarno Arvid LaukkonenfiledCriticalAarno Arvid Laukkonen
Priority to FI885475ApriorityCriticalpatent/FI82816C/en
Publication of FI885475A0publicationCriticalpatent/FI885475A0/en
Publication of FI885475ApublicationCriticalpatent/FI885475A/en
Application grantedgrantedCritical
Publication of FI82816BpublicationCriticalpatent/FI82816B/en
Publication of FI82816CpublicationCriticalpatent/FI82816C/en