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 А.Ф. Полянский, нский А.Ф. ПолfiledCriticalА.Ф. Полянский
Priority to SU409213ApriorityCriticalpatent/SU86510A1/en
Application grantedgrantedCritical
Publication of SU86510A1publicationCriticalpatent/SU86510A1/en