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.Ф. АлексеевfiledCriticalД.Ф. Алексеев
Priority to SU12638ApriorityCriticalpatent/SU11060A1/ru
Application grantedgrantedCritical
Publication of SU11060A1publicationCriticalpatent/SU11060A1/ru