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Application grantedgrantedCritical
Publication of SU51941A1publicationCriticalpatent/SU51941A1/ru
Publication of SU68300A1publicationCriticalpatent/SU68300A1/ru
Application filed by С.С. ВоюцкийfiledCriticalС.С. Воюцкий
Priority to SU320ApriorityCriticalpatent/SU69947A1/ru
Priority claimed from SU320Aexternal-prioritypatent/SU69947A1/ru
Publication of SU69947A1publicationCriticalpatent/SU69947A1/ru