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 Vladimir Ing Ekrt, Vasil Ing PanacisfiledCriticalVladimir Ing Ekrt
Priority to CS874389ApriorityCriticalpatent/CS264889B1/en
Publication of CS438987A1publicationCriticalpatent/CS438987A1/en
Publication of CS264889B1publicationCriticalpatent/CS264889B1/en