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 Г.С. ПетровfiledCriticalГ.С. Петров
Priority to SU12962ApriorityCriticalpatent/SU13959A1/ru
Application grantedgrantedCritical
Publication of SU13959A1publicationCriticalpatent/SU13959A1/ru