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 Rihak, Valihrach OtakarfiledCriticalJosef Rihak
Priority to CS877030ApriorityCriticalpatent/CS268321B1/en
Publication of CS703087A1publicationCriticalpatent/CS703087A1/en
Publication of CS268321B1publicationCriticalpatent/CS268321B1/en