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 И.В. Вирозуб, С.И. ЦепелевичfiledCriticalИ.В. Вирозуб
Priority to SU6629ApriorityCriticalpatent/SU76396A1/ru
Application grantedgrantedCritical
Publication of SU76396A1publicationCriticalpatent/SU76396A1/ru