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 Г. М. Ройко и Л. Г. РойкоfiledCriticalГ. М. Ройко и Л. Г. Ройко
Priority to SU772446164ApriorityCriticalpatent/SU649427A1/en
Application grantedgrantedCritical
Publication of SU649427A1publicationCriticalpatent/SU649427A1/en