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 Zdenek Ing Csc Mrazek, Ladislav Gruell, Vladimir Pacovsky, Stanislav Ing Csc SevcikfiledCriticalZdenek Ing Csc Mrazek
Priority to CS849230ApriorityCriticalpatent/CS253970B1/en
Priority to CS857125Aprioritypatent/CS254452B1/en
Publication of CS923084A1publicationCriticalpatent/CS923084A1/en
Publication of CS253970B1publicationCriticalpatent/CS253970B1/en