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 Barta, Zdenek Vostracky, Vaclav KulhanekfiledCriticalKarel Barta
Priority to CS777577ApriorityCriticalpatent/CS192915B1/cs
Publication of CS192915B1publicationCriticalpatent/CS192915B1/cs