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.Г. Озернова, М.М. ФальковаfiledCriticalЕ.Г. Озернова
Priority to SU374417ApriorityCriticalpatent/SU77359A1/en
Application grantedgrantedCritical
Publication of SU77359A1publicationCriticalpatent/SU77359A1/en