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 Hazdra, Miroslav LejsekfiledCriticalFrantisek Hazdra
Priority to CS622977ApriorityCriticalpatent/CS189503B1/cs
Publication of CS189503B1publicationCriticalpatent/CS189503B1/cs