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 Bohumil Bucek, Jan DvorakfiledCriticalBohumil Bucek
Priority to CS10275ApriorityCriticalpatent/CS181918B1/cs
Publication of CS181918B1publicationCriticalpatent/CS181918B1/cs