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 К. К. СтепановfiledCriticalК. К. Степанов
Priority to SU1742688ApriorityCriticalpatent/SU421377A1/ru
Priority claimed from SU1742688Aexternal-prioritypatent/SU421377A1/ru
Application grantedgrantedCritical
Publication of SU421377A2publicationCriticalpatent/SU421377A2/ru
Publication of SU421377A1publicationCriticalpatent/SU421377A1/ru