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 Н.В. СоломинfiledCriticalН.В. Соломин
Priority to SU386010ApriorityCriticalpatent/SU77319A1/en
Application grantedgrantedCritical
Publication of SU77319A1publicationCriticalpatent/SU77319A1/en