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 Josef Pelikan, Jan Vosta, Milan SmrzfiledCriticalJosef Pelikan
Priority to CS291776ApriorityCriticalpatent/CS182094B1/cs
Publication of CS182094B1publicationCriticalpatent/CS182094B1/cs