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.С. Добродеев, Р.Д. РомановfiledCriticalА.С. Добродеев
Priority to SU46121ApriorityCriticalpatent/SU76435A1/ru
Application grantedgrantedCritical
Publication of SU76435A1publicationCriticalpatent/SU76435A1/ru