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 В.А. Плотников, В.К. РазумовfiledCriticalВ.А. Плотников
Priority to SU74089ApriorityCriticalpatent/SU28903A1/en
Application grantedgrantedCritical
Publication of SU28903A1publicationCriticalpatent/SU28903A1/en