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 И.А. СергеевfiledCriticalИ.А. Сергеев
Priority to SU40133ApriorityCriticalpatent/SU12364A1/ru
Application grantedgrantedCritical
Publication of SU12364A1publicationCriticalpatent/SU12364A1/ru