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.В. КостинfiledCriticalВ.В. Костин
Priority to SU169741ApriorityCriticalpatent/SU45717A1/en
Application grantedgrantedCritical
Publication of SU45717A1publicationCriticalpatent/SU45717A1/en