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 SkalafiledCriticalJosef Skala
Priority to CS894477ApriorityCriticalpatent/CS192431B1/cs
Publication of CS192431B1publicationCriticalpatent/CS192431B1/cs