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 Н.С. Голоушин, В.П. ГундобинfiledCriticalН.С. Голоушин
Priority to SU2513ApriorityCriticalpatent/SU69553A1/en
Application grantedgrantedCritical
Publication of SU69553A1publicationCriticalpatent/SU69553A1/en