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 Smazal Vaclav, Frantisek LudvikfiledCriticalSmazal Vaclav
Priority to CS872829ApriorityCriticalpatent/CS262466B1/en
Publication of CS282987A1publicationCriticalpatent/CS282987A1/en
Publication of CS262466B1publicationCriticalpatent/CS262466B1/en