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 Mergl Zdenek, Frantisek BradafiledCriticalMergl Zdenek
Priority to CS846622ApriorityCriticalpatent/CS243174B1/en
Publication of CS662284A1publicationCriticalpatent/CS662284A1/en
Publication of CS243174B1publicationCriticalpatent/CS243174B1/en