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.Е. РанцевfiledCriticalВ.Е. Ранцев
Priority to SU66954ApriorityCriticalpatent/SU21412A1/en
Application grantedgrantedCritical
Publication of SU21412A1publicationCriticalpatent/SU21412A1/en