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Application filed by Eero HakkalafiledCriticalEero Hakkala
Priority to FI892249ApriorityCriticalpatent/FI85651C/en
Publication of FI892249A0publicationCriticalpatent/FI892249A0/en
Publication of FI892249ApublicationCriticalpatent/FI892249A/en
Publication of FI85651BpublicationCriticalpatent/FI85651B/en
Application grantedgrantedCritical
Publication of FI85651CpublicationCriticalpatent/FI85651C/en