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 В.Е. РачинскийfiledCriticalВ.Е. Рачинский
Priority to SU7290ApriorityCriticalpatent/SU4421A1/ru
Application grantedgrantedCritical
Publication of SU4421A1publicationCriticalpatent/SU4421A1/ru