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 Kalenda, Slavomil Hyman, Otto LizakfiledCriticalJaroslav Kalenda
Priority to CS195974ApriorityCriticalpatent/CS179043B1/cs
Publication of CS179043B1publicationCriticalpatent/CS179043B1/cs