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 А. П. ГромовfiledCriticalА. П. Громов
Priority to SU1710168ApriorityCriticalpatent/SU420264A1/ru
Priority claimed from SU1710168Aexternal-prioritypatent/SU420264A1/ru
Application grantedgrantedCritical
Publication of SU420264A2publicationCriticalpatent/SU420264A2/ru
Publication of SU420264A1publicationCriticalpatent/SU420264A1/ru