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. ШевченкоfiledCriticalВ. В. Шевченко
Priority to SU772538999ApriorityCriticalpatent/SU694185A1/en
Application grantedgrantedCritical
Publication of SU694185A1publicationCriticalpatent/SU694185A1/en