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 Walter Kopytko, Dusan Slezak, Zdenek BroklfiledCriticalWalter Kopytko
Priority to CS233675ApriorityCriticalpatent/CS186922B1/cs
Publication of CS186922B1publicationCriticalpatent/CS186922B1/cs