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 Kopchev, Petar V., Petrov, Jonitsa V., Andreev, Dimitar D.filedCriticalKopchev, Petar V.
Priority to BG8273588ApriorityCriticalpatent/BG51959B2/en
Publication of BG51959B2publicationCriticalpatent/BG51959B2/en