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 Georgi S Georgiev, Ivan G Kralev, Vasil D Vasilev, Ljubomir B Datschev, Assen S MorosovfiledCriticalGeorgi S Georgiev
Priority to CS844180ApriorityCriticalpatent/CS258431B1/en
Publication of CS418084A1publicationCriticalpatent/CS418084A1/en
Publication of CS258431B1publicationCriticalpatent/CS258431B1/en