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.А. ЧернышевfiledCriticalА.А. Чернышев
Priority to SU31654ApriorityCriticalpatent/SU17422A1/ru
Application grantedgrantedCritical
Publication of SU17422A1publicationCriticalpatent/SU17422A1/ru