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. АртемьевfiledCriticalН.А. Артемьев
Priority to SU216ApriorityCriticalpatent/SU73922A1/ru
Application grantedgrantedCritical
Publication of SU73922A1publicationCriticalpatent/SU73922A1/ru