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. МикулинfiledCriticalА.А. Микулин
Priority to SU1100ApriorityCriticalpatent/SU72045A1/ru
Application grantedgrantedCritical
Publication of SU72045A1publicationCriticalpatent/SU72045A1/ru