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 Jaroslav Stangl, Josef Pridal, Vladimir FrancfiledCriticalJaroslav Stangl
Priority to CS881377ApriorityCriticalpatent/CS192423B1/cs
Publication of CS192423B1publicationCriticalpatent/CS192423B1/cs