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 А.Г. БогданченкоfiledCriticalА.Г. Богданченко
Priority to SU387515ApriorityCriticalpatent/SU78210A1/en
Application grantedgrantedCritical
Publication of SU78210A1publicationCriticalpatent/SU78210A1/en