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 Frantisek Ficenc, Milan Ing HauskafiledCriticalFrantisek Ficenc
Priority to CS841742ApriorityCriticalpatent/CS239215B1/cs
Publication of CS174284A1publicationCriticalpatent/CS174284A1/cs
Publication of CS239215B1publicationCriticalpatent/CS239215B1/cs