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/SU432289A1/en
Priority claimed from SU1829872Aexternal-prioritypatent/SU432289A1/en
Application grantedgrantedCritical
Publication of SU432289A2publicationCriticalpatent/SU432289A2/en
Publication of SU432289A1publicationCriticalpatent/SU432289A1/en