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Publication date
Application grantedgrantedCritical
Publication of SU51039A1publicationCriticalpatent/SU51039A1/ru
Application filed by Г.С. Андрушкевич, У.Л. ШугалfiledCriticalГ.С. Андрушкевич
Priority to SU405ApriorityCriticalpatent/SU52372A1/ru
Priority claimed from SU405Aexternal-prioritypatent/SU52372A1/ru
Publication of SU52372A1publicationCriticalpatent/SU52372A1/ru