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 А.Л. Покровский, Г.И. ФертманfiledCriticalА.Л. Покровский
Priority to SU2358ApriorityCriticalpatent/SU68535A1/ru
Application grantedgrantedCritical
Publication of SU68535A1publicationCriticalpatent/SU68535A1/ru