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 П.П. БраилкоfiledCriticalП.П. Браилко
Priority to SU64499ApriorityCriticalpatent/SU20800A1/en
Application grantedgrantedCritical
Publication of SU20800A1publicationCriticalpatent/SU20800A1/en