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.В. АндреевfiledCriticalВ.В. Андреев
Priority to SU51590ApriorityCriticalpatent/SU18967A1/ru
Application grantedgrantedCritical
Publication of SU18967A1publicationCriticalpatent/SU18967A1/ru