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 Vymetal Jan, Ivan Ing ChvatalfiledCriticalVymetal Jan
Priority to CS883261ApriorityCriticalpatent/CS269254B1/en
Publication of CS326188A1publicationCriticalpatent/CS326188A1/en
Publication of CS269254B1publicationCriticalpatent/CS269254B1/en