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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.)
Filing date
Publication date
Application filed by А. С. Гуревич , Б. В. МихеевfiledCriticalА. С. Гуревич , Б. В. Михеев
Priority to SU1820677ApriorityCriticalpatent/SU420466A1/ru
Application grantedgrantedCritical
Publication of SU420466A1publicationCriticalpatent/SU420466A1/ru