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.В. Богданов, М.И. ФельдманfiledCriticalА.В. Богданов
Priority to SU2377ApriorityCriticalpatent/SU70112A1/ru
Application grantedgrantedCritical
Publication of SU70112A1publicationCriticalpatent/SU70112A1/ru