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.Г. Рысс, В.С. ЯтловfiledCriticalИ.Г. Рысс
Priority to SU136457ApriorityCriticalpatent/SU36392A1/ru
Application grantedgrantedCritical
Publication of SU36392A1publicationCriticalpatent/SU36392A1/ru