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 Jan Ing Dyrrt, Miloslav Ing BrezinafiledCriticalJan Ing Dyrrt
Priority to CS64488ApriorityCriticalpatent/CS273562B1/en
Publication of CS64488A1publicationCriticalpatent/CS64488A1/en
Publication of CS273562B1publicationCriticalpatent/CS273562B1/en