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 Josef Ing Csc Pelis, Emil Ing Ondruska, Benda BretislavfiledCriticalJosef Ing Csc Pelis
Priority to CS863263ApriorityCriticalpatent/CS253838B1/en
Publication of CS326386A1publicationCriticalpatent/CS326386A1/en
Publication of CS253838B1publicationCriticalpatent/CS253838B1/en