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 Ferdinand Lenorak, Michal Suska, Frantisek PotrokfiledCriticalFerdinand Lenorak
Priority to CS873179ApriorityCriticalpatent/CS222307B1/cs
Publication of CS222307B1publicationCriticalpatent/CS222307B1/cs