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 С.С. ФилимоновfiledCriticalС.С. Филимонов
Priority to SU3890ApriorityCriticalpatent/SU67326A1/ru
Application grantedgrantedCritical
Publication of SU67326A1publicationCriticalpatent/SU67326A1/ru