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 Ivan S Kalchev, Dimit R N NikolchevfiledCriticalIvan S Kalchev
Priority to BG8311488ApriorityCriticalpatent/BG45325A1/xx
Publication of BG45325A1publicationCriticalpatent/BG45325A1/xx