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.Г. СергеевfiledCriticalА.Г. Сергеев
Priority to SU4928ApriorityCriticalpatent/SU72036A1/en
Application grantedgrantedCritical
Publication of SU72036A1publicationCriticalpatent/SU72036A1/en