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 Krotil, Egon Pidra, Vladimir KovarikfiledCriticalFrantisek Krotil
Priority to CS56378ApriorityCriticalpatent/CS190597B1/cs
Publication of CS190597B1publicationCriticalpatent/CS190597B1/cs