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 SU395122A1publicationCriticalpatent/SU395122A1/ru
Application filedfiledCritical
Priority to SU1830862ApriorityCriticalpatent/SU395122A2/ru
Application grantedgrantedCritical
Publication of SU395122A2publicationCriticalpatent/SU395122A2/ru