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.)
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Application filedfiledCritical
Priority to BG2550474ApriorityCriticalpatent/BG20244A1/xx
Priority to DD18351775Aprioritypatent/DD116985A5/xx
Priority to SU752096822Aprioritypatent/SU587519A1/ru
Publication of BG20244A1publicationCriticalpatent/BG20244A1/xx
