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 Pavel Ing Kostka, Miiroslav Cervinka, Bohumil Ing Sevcik, Oswald Anton, Jehlar PeterfiledCriticalPavel Ing Kostka
Priority to CS858565ApriorityCriticalpatent/CS257458B1/en
Publication of CS856585A1publicationCriticalpatent/CS856585A1/en
Publication of CS257458B1publicationCriticalpatent/CS257458B1/en