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 П.В. Мумриков, И.Л. СтепыкинfiledCriticalП.В. Мумриков
Priority to SU77ApriorityCriticalpatent/SU65215A1/ru
Application grantedgrantedCritical
Publication of SU65215A1publicationCriticalpatent/SU65215A1/ru