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 С.В. КонстантовfiledCriticalС.В. Константов
Priority to SU1831ApriorityCriticalpatent/SU2766A1/ru
Application grantedgrantedCritical
Publication of SU2766A1publicationCriticalpatent/SU2766A1/ru