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 Jaroslav Kocour, Josef Ing CernikfiledCriticalJaroslav Kocour
Priority to CS87630ApriorityCriticalpatent/CS261153B1/en
Publication of CS63087A1publicationCriticalpatent/CS63087A1/en
Publication of CS261153B1publicationCriticalpatent/CS261153B1/en