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 Я.В. МаминfiledCriticalЯ.В. Мамин
Priority to SU2618ApriorityCriticalpatent/SU1843A1/ru
Application grantedgrantedCritical
Publication of SU1843A1publicationCriticalpatent/SU1843A1/ru