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 Jaroslav Ing Csc Libal, Jan Ing Pfefferle, Imrich Cecho, Stanislav Ing Csc KacafirekfiledCriticalJaroslav Ing Csc Libal
Priority to CS857989ApriorityCriticalpatent/CS253112B1/en
Publication of CS798985A1publicationCriticalpatent/CS798985A1/en
Publication of CS253112B1publicationCriticalpatent/CS253112B1/en