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 П.Д. Желтяков, ков П.Д. ЖелтfiledCriticalП.Д. Желтяков
Priority to SU44508ApriorityCriticalpatent/SU19685A1/en
Priority claimed from SU44508Aexternal-prioritypatent/SU19685A1/en
Application grantedgrantedCritical
Publication of SU19686A1publicationCriticalpatent/SU19686A1/en
Publication of SU19685A1publicationCriticalpatent/SU19685A1/en