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.П. НекрасовfiledCriticalВ.П. Некрасов
Priority to SU143012ApriorityCriticalpatent/SU42461A1/ru
Application grantedgrantedCritical
Publication of SU42461A1publicationCriticalpatent/SU42461A1/ru