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 Н.Н. ТумановfiledCriticalН.Н. Туманов
Priority to SU370403ApriorityCriticalpatent/SU77384A1/en
Application grantedgrantedCritical
Publication of SU77384A1publicationCriticalpatent/SU77384A1/en