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
Application filedfiledCritical
Priority to SU1803082ApriorityCriticalpatent/SU431390A1/ru
Application grantedgrantedCritical
Publication of SU431390A1publicationCriticalpatent/SU431390A1/ru