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 К. В. БержанскисfiledCriticalК. В. Бержанскис
Priority to SU731965702ApriorityCriticalpatent/SU654775A1/en
Application grantedgrantedCritical
Publication of SU654775A1publicationCriticalpatent/SU654775A1/en