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 Otakar MichalekfiledCriticalOtakar Michalek
Priority to CS869416ApriorityCriticalpatent/CS261123B1/en
Publication of CS941686A1publicationCriticalpatent/CS941686A1/en
Publication of CS261123B1publicationCriticalpatent/CS261123B1/en