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 Vaclav Klecan, Karel Prochazka, Jan NovakfiledCriticalVaclav Klecan
Priority to CS194874ApriorityCriticalpatent/CS165722B1/cs
Publication of CS165722B1publicationCriticalpatent/CS165722B1/cs