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.Н. Бородин, А.И. КонновfiledCriticalК.Н. Бородин
Priority to SU136100ApriorityCriticalpatent/SU41396A1/en
Application grantedgrantedCritical
Publication of SU41396A1publicationCriticalpatent/SU41396A1/en