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 Wichterle OttofiledCriticalWichterle Otto
Priority to CS673288ApriorityCriticalpatent/CS274970B2/en
Publication of CS673288A2publicationCriticalpatent/CS673288A2/en
Publication of CS274970B2publicationCriticalpatent/CS274970B2/en