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.Д. РомановfiledCriticalВ.Д. Романов
Priority to SU56553ApriorityCriticalpatent/SU17704A1/ru
Application grantedgrantedCritical
Publication of SU17704A1publicationCriticalpatent/SU17704A1/ru