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 PospisilfiledCriticalKarel Pospisil
Priority to CS894089ApriorityCriticalpatent/CS408989A1/en
Publication of CS408989A1publicationCriticalpatent/CS408989A1/en