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 German S Rysev, Vladimir K Lipskij, Igor N TroickijfiledCriticalGerman S Rysev
Priority to CS831577ApriorityCriticalpatent/CS246584B1/en
Publication of CS157783A1publicationCriticalpatent/CS157783A1/en
Publication of CS246584B1publicationCriticalpatent/CS246584B1/en