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. Астафьев, Б.А. ШиллеровfiledCriticalА.В. Астафьев
Priority to SU55240ApriorityCriticalpatent/SU20227A1/ru
Application grantedgrantedCritical
Publication of SU20227A1publicationCriticalpatent/SU20227A1/ru