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 Tlaskal, Vanek FrantisekfiledCriticalZdenek Tlaskal
Priority to CS856998ApriorityCriticalpatent/CS253046B1/en
Publication of CS699885A1publicationCriticalpatent/CS699885A1/en
Publication of CS253046B1publicationCriticalpatent/CS253046B1/en