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 Jan SvobodafiledCriticalJan Svoboda
Priority to CS865985ApriorityCriticalpatent/CS257062B1/en
Publication of CS598586A1publicationCriticalpatent/CS598586A1/en
Publication of CS257062B1publicationCriticalpatent/CS257062B1/en