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 Antonin Novotny, Ladislav Ing PtacekfiledCriticalAntonin Novotny
Priority to CS848795ApriorityCriticalpatent/CS251636B1/en
Publication of CS879584A1publicationCriticalpatent/CS879584A1/en
Publication of CS251636B1publicationCriticalpatent/CS251636B1/en