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 Zdenek Ing Csc Rychlik, Jan Ing LangerfiledCriticalZdenek Ing Csc Rychlik
Priority to CS87449ApriorityCriticalpatent/CS261987B1/en
Publication of CS44987A1publicationCriticalpatent/CS44987A1/en
Publication of CS261987B1publicationCriticalpatent/CS261987B1/en