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.Е. РаковскийfiledCriticalВ.Е. Раковский
Priority to SU11962ApriorityCriticalpatent/SU10347A1/ru
Application grantedgrantedCritical
Publication of SU10347A1publicationCriticalpatent/SU10347A1/ru