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 SU403915A1publicationCriticalpatent/SU403915A1/ru
Priority claimed from SU1774846Aexternal-prioritypatent/SU403915A1/ru
Application filedfiledCritical
Priority to SU1774846ApriorityCriticalpatent/SU403915A1/ru
Application grantedgrantedCritical
Publication of SU403915A2publicationCriticalpatent/SU403915A2/ru