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 Ladislav Ing Prokopec, Jiri Ing HlavacekfiledCriticalLadislav Ing Prokopec
Priority to CS904206ApriorityCriticalpatent/CS420690A3/en
Publication of CS420690A3publicationCriticalpatent/CS420690A3/en