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.И. ТимофеевfiledCriticalВ.И. Тимофеев
Priority to SU381763ApriorityCriticalpatent/SU77338A1/en
Application grantedgrantedCritical
Publication of SU77338A1publicationCriticalpatent/SU77338A1/en