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.А. СоколовfiledCriticalН.А. Соколов
Priority to SU116759ApriorityCriticalpatent/SU33985A1/en
Application grantedgrantedCritical
Publication of SU33985A1publicationCriticalpatent/SU33985A1/en