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 Josef Vanek, Ruzena VankovafiledCriticalJosef Vanek
Priority to CS119476ApriorityCriticalpatent/CS178759B1/en
Publication of CS178759B1publicationCriticalpatent/CS178759B1/en