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 Vyzk Ustav Stavebnich HmotfiledCriticalVyzk Ustav Stavebnich Hmot
Priority to DD26593984ApriorityCriticalpatent/DD244033A3/en
Publication of DD244033A3publicationCriticalpatent/DD244033A3/en