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 И.Д. Абрамсон, Д.Л. Бохан, В.В. МалышевfiledCriticalИ.Д. Абрамсон
Priority to SU192297ApriorityCriticalpatent/SU51858A1/ru
Application grantedgrantedCritical
Publication of SU51858A1publicationCriticalpatent/SU51858A1/ru