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.А. РадцигfiledCriticalВ.А. Радциг
Priority to SU182016ApriorityCriticalpatent/SU50107A1/en
Application grantedgrantedCritical
Publication of SU50107A1publicationCriticalpatent/SU50107A1/en