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 Petko M Zheljazov, Petrov Petr PfiledCriticalPetko M Zheljazov
Priority to BG7909387ApriorityCriticalpatent/BG43658A1/en
Publication of BG43658A1publicationCriticalpatent/BG43658A1/en