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 Karel Sil, Vaclav RadafiledCriticalKarel Sil
Priority to CS883592ApriorityCriticalpatent/CS269269B1/cs
Publication of CS359288A1publicationCriticalpatent/CS359288A1/cs
Publication of CS269269B1publicationCriticalpatent/CS269269B1/cs