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 Н.А. Зайцев, Н.С. ТихоновfiledCriticalН.А. Зайцев
Priority to SU126181ApriorityCriticalpatent/SU39895A1/ru
Application grantedgrantedCritical
Publication of SU39895A1publicationCriticalpatent/SU39895A1/ru