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 Н.Л. КвашинfiledCriticalН.Л. Квашин
Priority to SU46217ApriorityCriticalpatent/SU23835A1/ru
Application grantedgrantedCritical
Publication of SU23835A1publicationCriticalpatent/SU23835A1/ru