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.М. Благовестов, С.С. ДриленокfiledCriticalА.М. Благовестов
Priority to SU380304ApriorityCriticalpatent/SU75021A1/ru
Application grantedgrantedCritical
Publication of SU75021A1publicationCriticalpatent/SU75021A1/ru