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 CS877041ApriorityCriticalpatent/CS265719B1/cs
Publication of CS704187A1publicationCriticalpatent/CS704187A1/cs
Publication of CS265719B1publicationCriticalpatent/CS265719B1/cs