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.Н. Бух, С.Н. БухfiledCriticalВ.Н. Бух
Priority to SU171372ApriorityCriticalpatent/SU47918A1/en
Application grantedgrantedCritical
Publication of SU47918A1publicationCriticalpatent/SU47918A1/en