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.Г. Лейтес, Н.М. ЧетвериковfiledCriticalВ.Г. Лейтес
Priority to SU128671ApriorityCriticalpatent/SU33144A1/ru
Application grantedgrantedCritical
Publication of SU33144A1publicationCriticalpatent/SU33144A1/ru