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
Publication of SU404449A1publicationCriticalpatent/SU404449A1/ru
Priority claimed from SU1772788Aexternal-prioritypatent/SU404449A1/ru
Application filedfiledCritical
Priority to SU1772788ApriorityCriticalpatent/SU404449A1/ru
Application grantedgrantedCritical
Publication of SU404449A2publicationCriticalpatent/SU404449A2/ru