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 Vyskocil Frantisek, Ruzicka Karel, Josef Ing Csc PrikrylfiledCriticalVyskocil Frantisek
Priority to CS834538ApriorityCriticalpatent/CS237067B1/en
Publication of CS453883A1publicationCriticalpatent/CS453883A1/en
Publication of CS237067B1publicationCriticalpatent/CS237067B1/en