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.Д. РыбакfiledCriticalА.Д. Рыбак
Priority to SU195490ApriorityCriticalpatent/SU51088A1/ru
Application grantedgrantedCritical
Publication of SU51088A1publicationCriticalpatent/SU51088A1/ru