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 Д.П. Васильев, П.Л. КормилицынfiledCriticalД.П. Васильев
Priority to SU30981KpriorityCriticalpatent/SU15781A1/ru
Priority to SU30981Aprioritypatent/SU15780A1/ru
Application grantedgrantedCritical
Publication of SU15780A1publicationCriticalpatent/SU15780A1/ru