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 Karel Englis, Frantisek LandafiledCriticalKarel Englis
Priority to CS242875ApriorityCriticalpatent/CS178603B1/en
Publication of CS178603B1publicationCriticalpatent/CS178603B1/en