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 Leopold Bernat, Jan BuresfiledCriticalLeopold Bernat
Priority to CS590777ApriorityCriticalpatent/CS189496B1/cs
Publication of CS189496B1publicationCriticalpatent/CS189496B1/cs