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 filedfiledCritical
Priority to CS275472ApriorityCriticalpatent/CS157962B1/cs
Priority to DD17009873Aprioritypatent/DD104350A1/xx
Priority to AT340273Aprioritypatent/AT323872B/de
Publication of CS157962B1publicationCriticalpatent/CS157962B1/cs