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 SU409421A1publicationCriticalpatent/SU409421A1/ru
Priority claimed from SU1130511Aexternal-prioritypatent/SU409421A1/ru
Application filedfiledCritical
Priority to SU1130511ApriorityCriticalpatent/SU409421A1/ru
Application grantedgrantedCritical
Publication of SU409421A3publicationCriticalpatent/SU409421A3/ru