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. МихайловfiledCriticalВ.В. Михайлов
Priority to SU176365ApriorityCriticalpatent/SU47353A1/ru
Application grantedgrantedCritical
Publication of SU47353A1publicationCriticalpatent/SU47353A1/ru