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 В. М. КрасильщиковfiledCriticalВ. М. Красильщиков
Priority to SU1630529ApriorityCriticalpatent/SU420809A1/ru
Application grantedgrantedCritical
Publication of SU420809A1publicationCriticalpatent/SU420809A1/ru