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 Vaclav VlkfiledCriticalVaclav Vlk
Priority to CS845059ApriorityCriticalpatent/CS239775B1/en
Publication of CS505984A1publicationCriticalpatent/CS505984A1/en
Publication of CS239775B1publicationCriticalpatent/CS239775B1/en