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 Karel Ing Holfeuer, Vaclav Ing Vinklat, Ivan Ing HlavacekfiledCriticalKarel Ing Holfeuer
Priority to CS851661ApriorityCriticalpatent/CS251873B1/en
Publication of CS166185A1publicationCriticalpatent/CS166185A1/en
Publication of CS251873B1publicationCriticalpatent/CS251873B1/en