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. СергеевfiledCriticalА.П. Сергеев
Priority to SU136366ApriorityCriticalpatent/SU41535A1/ru
Application grantedgrantedCritical
Publication of SU41535A1publicationCriticalpatent/SU41535A1/ru