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 Kovar, Ludek Rndr Csc Travnicek, Novotny KarelfiledCriticalJosef Kovar
Priority to CS828979ApriorityCriticalpatent/CS231341B1/en
Publication of CS897982A1publicationCriticalpatent/CS897982A1/en
Publication of CS231341B1publicationCriticalpatent/CS231341B1/en