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 DD18060274ApriorityCriticalpatent/DD114823A1/xx
Priority to SU752159075Aprioritypatent/SU666185A1/ru
Priority to CS561775Aprioritypatent/CS190676B1/cs
Publication of DD114823A1publicationCriticalpatent/DD114823A1/xx