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. Н. Селезнев, А. А. СимоновfiledCriticalЕ. Н. Селезнев
Priority to SU1868918ApriorityCriticalpatent/SU427445A1/en
Priority claimed from SU1868918Aexternal-prioritypatent/SU427445A1/en
Application grantedgrantedCritical
Publication of SU427445A2publicationCriticalpatent/SU427445A2/en
Publication of SU427445A1publicationCriticalpatent/SU427445A1/en