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 Josef Ing VymetalfiledCriticalJosef Ing Vymetal
Priority to CS831148ApriorityCriticalpatent/CS233775B1/en
Publication of CS114883A1publicationCriticalpatent/CS114883A1/en
Publication of CS233775B1publicationCriticalpatent/CS233775B1/en