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.В. МакаровfiledCriticalЕ.В. Макаров
Priority to SU389706ApriorityCriticalpatent/SU78220A1/en
Application grantedgrantedCritical
Publication of SU78220A1publicationCriticalpatent/SU78220A1/en