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 И.О. ТрофимовfiledCriticalИ.О. Трофимов
Priority to SU1224ApriorityCriticalpatent/SU1784A1/ru
Application grantedgrantedCritical
Publication of SU1784A1publicationCriticalpatent/SU1784A1/ru