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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Application filed by В.Д. Потапов, М.С. УлановfiledCriticalВ.Д. Потапов
Priority to SU176133ApriorityCriticalpatent/SU47705A1/en
Application grantedgrantedCritical
Publication of SU47705A1publicationCriticalpatent/SU47705A1/en