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 П.Д. АлексеевfiledCriticalП.Д. Алексеев
Priority to SU62795ApriorityCriticalpatent/SU20969A1/ru
Application grantedgrantedCritical
Publication of SU20969A1publicationCriticalpatent/SU20969A1/ru