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 А.П. КруппаfiledCriticalА.П. Круппа
Priority to SU822ApriorityCriticalpatent/SU71925A1/en
Application grantedgrantedCritical
Publication of SU71925A1publicationCriticalpatent/SU71925A1/en