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 Cechal Zdenek, Josef Ing SchwarzfiledCriticalCechal Zdenek
Priority to CS844123ApriorityCriticalpatent/CS242397B1/en
Publication of CS412384A1publicationCriticalpatent/CS412384A1/en
Publication of CS242397B1publicationCriticalpatent/CS242397B1/en