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.П. СкрыльниковfiledCriticalС.П. Скрыльников
Priority to SU137385ApriorityCriticalpatent/SU51136A1/en
Application grantedgrantedCritical
Publication of SU51136A1publicationCriticalpatent/SU51136A1/en