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 К.А. СимоновfiledCriticalК.А. Симонов
Priority to SU157704ApriorityCriticalpatent/SU43129A1/en
Application grantedgrantedCritical
Publication of SU43129A1publicationCriticalpatent/SU43129A1/en