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Application grantedgrantedCritical
Publication of SU3859A1publicationCriticalpatent/SU3859A1/ru
Application filed by К.Ф. Успенский, А.К. ШумейкоfiledCriticalК.Ф. Успенский
Priority to SU4136ApriorityCriticalpatent/SU65478A1/ru
Publication of SU65478A1publicationCriticalpatent/SU65478A1/ru