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Application filed by Jalmari Selim Virkki, Weckman PenttifiledCriticalJalmari Selim Virkki
Priority to FI762984ApriorityCriticalpatent/FI54716C/fi
Publication of FI762984A7publicationCriticalpatent/FI762984A7/fi
Application grantedgrantedCritical
Publication of FI54716BpublicationCriticalpatent/FI54716B/fi
Publication of FI54716CpublicationCriticalpatent/FI54716C/fi