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 Petr Ing Levy, Zdenek Ing MavlikfiledCriticalPetr Ing Levy
Priority to CS856648ApriorityCriticalpatent/CS255423B1/en
Publication of CS664885A1publicationCriticalpatent/CS664885A1/en
Publication of CS255423B1publicationCriticalpatent/CS255423B1/en