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 filed by Stojan S Ljuckanov, Dimitr K BozkovfiledCriticalStojan S Ljuckanov
Priority to CS853142ApriorityCriticalpatent/CS314285A1/en
Publication of CS314285A1publicationCriticalpatent/CS314285A1/en