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 П.А. Бобров, С.П. НасакинfiledCriticalП.А. Бобров
Priority to SU150752ApriorityCriticalpatent/SU43005A1/en
Application grantedgrantedCritical
Publication of SU43005A1publicationCriticalpatent/SU43005A1/en