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 К.А. Андрианов, С.Н. Устинов, Б.А. ХижfiledCriticalК.А. Андрианов
Priority to SU556ApriorityCriticalpatent/SU76605A1/en
Application grantedgrantedCritical
Publication of SU76605A1publicationCriticalpatent/SU76605A1/en