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 А.Л. ЛихтманfiledCriticalА.Л. Лихтман
Priority to SU66382ApriorityCriticalpatent/SU38138A1/ru
Application grantedgrantedCritical
Publication of SU38138A1publicationCriticalpatent/SU38138A1/ru