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 Kopal, Ladislav Svoboda, Josef Simane, Bohumil MilichovskyfiledCriticalJaroslav Kopal
Priority to CS450677ApriorityCriticalpatent/CS188042B1/cs
Publication of CS188042B1publicationCriticalpatent/CS188042B1/cs