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.И. ГрудзинскийfiledCriticalА.И. Грудзинский
Priority to SU26256ApriorityCriticalpatent/SU23572A1/ru
Application grantedgrantedCritical
Publication of SU23572A1publicationCriticalpatent/SU23572A1/ru