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 Hrzan Emil, Kuna Vaclav, Petrasek PetrfiledCriticalHrzan Emil
Priority to CS874810ApriorityCriticalpatent/CS264439B1/en
Publication of CS481087A1publicationCriticalpatent/CS481087A1/en
Publication of CS264439B1publicationCriticalpatent/CS264439B1/en