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 Berek Dusan, Novak IvanfiledCriticalBerek Dusan
Priority to CS865281ApriorityCriticalpatent/CS257144B1/cs
Publication of CS528186A1publicationCriticalpatent/CS528186A1/cs
Publication of CS257144B1publicationCriticalpatent/CS257144B1/cs