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 A ZefiledCriticalVyzk Ustav Stavebnich A Ze
Priority to CS902262ApriorityCriticalpatent/CS226290A2/en
Publication of CS226290A2publicationCriticalpatent/CS226290A2/en