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 SU1773251ApriorityCriticalpatent/SU414236A1/ru
Application grantedgrantedCritical
Publication of SU414236A1publicationCriticalpatent/SU414236A1/ru