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 Е.Н. Меркулова, А.Я. ЯкубовичfiledCriticalЕ.Н. Меркулова
Priority to SU44519ApriorityCriticalpatent/SU64530A1/ru
Application grantedgrantedCritical
Publication of SU64530A1publicationCriticalpatent/SU64530A1/ru