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 Ludovit Mudr Zelinsky, Marian Ing VrabelfiledCriticalLudovit Mudr Zelinsky
Priority to CS828738ApriorityCriticalpatent/CS243762B1/en
Publication of CS873882A1publicationCriticalpatent/CS873882A1/en
Publication of CS243762B1publicationCriticalpatent/CS243762B1/en