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 Л.О. ЛунгинfiledCriticalЛ.О. Лунгин
Priority to SU167695ApriorityCriticalpatent/SU47930A1/en
Application grantedgrantedCritical
Publication of SU47930A1publicationCriticalpatent/SU47930A1/en