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. ПерепелицаfiledCriticalА.А. Перепелица
Priority to SU313ApriorityCriticalpatent/SU67931A1/ru
Application grantedgrantedCritical
Publication of SU67931A1publicationCriticalpatent/SU67931A1/ru