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. Кудрявцев, вцев И.В. КудрfiledCriticalИ.В. Кудрявцев
Priority to SU616ApriorityCriticalpatent/SU76873A1/ru
Application grantedgrantedCritical
Publication of SU76873A1publicationCriticalpatent/SU76873A1/ru