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 Jaroslav Ing Vondrasek, Ladislav TruhlarovskyfiledCriticalJaroslav Ing Vondrasek
Priority to CS853911ApriorityCriticalpatent/CS255567B1/en
Publication of CS391185A1publicationCriticalpatent/CS391185A1/en
Publication of CS255567B1publicationCriticalpatent/CS255567B1/en