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 Д.С. Бабкин, С.В. РодионовfiledCriticalД.С. Бабкин
Priority to SU48949ApriorityCriticalpatent/SU19235A1/en
Application grantedgrantedCritical
Publication of SU19235A1publicationCriticalpatent/SU19235A1/en