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 Zdenek Vojtisek, Miloslav OpletalfiledCriticalZdenek Vojtisek
Priority to CS607273ApriorityCriticalpatent/CS178507B1/cs
Publication of CS178507B1publicationCriticalpatent/CS178507B1/cs