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
Publication of SU391265A1publicationCriticalpatent/SU391265A1/ru
Priority claimed from SU1600770Aexternal-prioritypatent/SU391265A1/ru
Application filedfiledCritical
Priority to SU1600770ApriorityCriticalpatent/SU391265A1/ru
Application grantedgrantedCritical
Publication of SU391265A2publicationCriticalpatent/SU391265A2/ru