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 Savel Jan, Richard Ing TrochtafiledCriticalSavel Jan
Priority to CS85803ApriorityCriticalpatent/CS257905B1/en
Publication of CS80385A1publicationCriticalpatent/CS80385A1/en
Publication of CS257905B1publicationCriticalpatent/CS257905B1/en