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 Frantisek Ferkl, Josef Skala, Milos Vecera, Ladislav Civrny, Oldrich TesarfiledCriticalFrantisek Ferkl
Priority to CS925281ApriorityCriticalpatent/CS222386B1/en
Publication of CS222386B1publicationCriticalpatent/CS222386B1/en