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 М.А. БеккертfiledCriticalМ.А. Беккерт
Priority to SU740ApriorityCriticalpatent/SU72008A1/ru
Application grantedgrantedCritical
Publication of SU72008A1publicationCriticalpatent/SU72008A1/ru