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 П.П. Новожилов, И.М. ФингаузfiledCriticalП.П. Новожилов
Priority to SU183393ApriorityCriticalpatent/SU50211A1/ru
Application grantedgrantedCritical
Publication of SU50211A1publicationCriticalpatent/SU50211A1/ru