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Application grantedgrantedCritical
Publication of SU57657A1publicationCriticalpatent/SU57657A1/ru
Application filed by Б.А. КособрюховfiledCriticalБ.А. Кособрюхов
Priority to SU1636ApriorityCriticalpatent/SU64947A1/ru
Priority claimed from SU1636Aexternal-prioritypatent/SU64947A1/ru
Publication of SU64947A1publicationCriticalpatent/SU64947A1/ru