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 М.М. ШмаринfiledCriticalМ.М. Шмарин
Priority to SU66895ApriorityCriticalpatent/SU20323A1/ru
Application grantedgrantedCritical
Publication of SU20323A1publicationCriticalpatent/SU20323A1/ru