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 Ф.Г. НиконовfiledCriticalФ.Г. Никонов
Priority to SU91394ApriorityCriticalpatent/SU29320A1/en
Application grantedgrantedCritical
Publication of SU29320A1publicationCriticalpatent/SU29320A1/en