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 Borecky, Frantisek LancingerfiledCriticalJaroslav Borecky
Priority to CS93772ApriorityCriticalpatent/CS157537B1/cs
Publication of CS157537B1publicationCriticalpatent/CS157537B1/cs