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 О. П. Попов , В. И. Миткалинный, , сплавовfiledCriticalО. П. Попов , В. И. Миткалинный
Priority to SU1705647ApriorityCriticalpatent/SU393309A1/ru
Application grantedgrantedCritical
Publication of SU393309A1publicationCriticalpatent/SU393309A1/ru