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 Krejci Josef, Miroslav Ing Csc MandlfiledCriticalKrejci Josef
Priority to CS874932ApriorityCriticalpatent/CS263316B1/en
Publication of CS493287A1publicationCriticalpatent/CS493287A1/en
Publication of CS263316B1publicationCriticalpatent/CS263316B1/en