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.С. МансуровfiledCriticalА.С. Мансуров
Priority to SU43967ApriorityCriticalpatent/SU71984A1/en
Application grantedgrantedCritical
Publication of SU71984A1publicationCriticalpatent/SU71984A1/en