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.Г. ИгнатьевfiledCriticalМ.Г. Игнатьев
Priority to SU2827479/25ApriorityCriticalpatent/SU803744A1/ru
Application grantedgrantedCritical
Publication of SU803744A1publicationCriticalpatent/SU803744A1/ru