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 Pospisil, Fotul Ilja, Vaclav Ing StulzfiledCriticalJosef Pospisil
Priority to CS872208ApriorityCriticalpatent/CS262928B1/en
Publication of CS220887A1publicationCriticalpatent/CS220887A1/en
Publication of CS262928B1publicationCriticalpatent/CS262928B1/en