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.П. ГерлеманfiledCriticalА.П. Герлеман
Priority to SU111120ApriorityCriticalpatent/SU33977A1/ru
Application grantedgrantedCritical
Publication of SU33977A1publicationCriticalpatent/SU33977A1/ru