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 Д.А. ДульчевскийfiledCriticalД.А. Дульчевский
Priority to SU33714ApriorityCriticalpatent/SU10876A1/ru
Application grantedgrantedCritical
Publication of SU10876A1publicationCriticalpatent/SU10876A1/ru