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. Л. ДобровольскийfiledCriticalВ. Л. Добровольский
Priority to SU1792366ApriorityCriticalpatent/SU435921A1/ru
Priority claimed from SU1792366Aexternal-prioritypatent/SU435921A1/ru
Application grantedgrantedCritical
Publication of SU435921A2publicationCriticalpatent/SU435921A2/ru
Publication of SU435921A1publicationCriticalpatent/SU435921A1/ru