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 RoubicekfiledCriticalJosef Roubicek
Priority to CS832400ApriorityCriticalpatent/CS256402B1/en
Publication of CS240083A1publicationCriticalpatent/CS240083A1/en
Publication of CS256402B1publicationCriticalpatent/CS256402B1/en