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.Н. РезниковfiledCriticalИ.Н. Резников
Priority to SU373049ApriorityCriticalpatent/SU74268A1/en
Application grantedgrantedCritical
Publication of SU74268A1publicationCriticalpatent/SU74268A1/en