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Application filed by V Elektrotech I V I LeninafiledCriticalV Elektrotech I V I Lenina
Priority to FI783552ApriorityCriticalpatent/FI67457C/en
Publication of FI783552ApublicationCriticalpatent/FI783552A/en
Application grantedgrantedCritical
Publication of FI67457BpublicationCriticalpatent/FI67457B/en
Publication of FI67457CpublicationCriticalpatent/FI67457C/en