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 DD18074174ApriorityCriticalpatent/DD113560A1/xx
Publication of DD113560A1publicationCriticalpatent/DD113560A1/xx
Priority to SU752162162Aprioritypatent/SU706423A1/ru