Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by В. М. Сикорский, Л. М. СазоновfiledCriticalВ. М. Сикорский
Priority to SU1829872ApriorityCriticalpatent/SU432289A2/ru
Application grantedgrantedCritical
Publication of SU432289A1publicationCriticalpatent/SU432289A1/ru
Publication of SU432289A2publicationCriticalpatent/SU432289A2/ru