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.Ф. Кротов, А.В. ТалановfiledCriticalИ.Ф. Кротов
Priority to SU77983ApriorityCriticalpatent/SU2153A1/en
Application grantedgrantedCritical
Publication of SU2153A1publicationCriticalpatent/SU2153A1/en