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.)
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Publication date
Application filed by В.А. Брагин, А.М. Григорян, н А.М. ГригорfiledCriticalВ.А. Брагин
Priority to SU77ApriorityCriticalpatent/SU69419A1/en
Application grantedgrantedCritical
Publication of SU69419A1publicationCriticalpatent/SU69419A1/en