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 Ф.П. ШтенниковfiledCriticalФ.П. Штенников
Priority to SU63309ApriorityCriticalpatent/SU22435A1/ru
Application grantedgrantedCritical
Publication of SU22435A1publicationCriticalpatent/SU22435A1/ru