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 Boleslav KristekfiledCriticalBoleslav Kristek
Priority to CS888322ApriorityCriticalpatent/CS271840B1/en
Publication of CS832288A1publicationCriticalpatent/CS832288A1/en
Publication of CS271840B1publicationCriticalpatent/CS271840B1/en