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. МатиссенfiledCriticalП.П. Матиссен
Priority to SU169001ApriorityCriticalpatent/SU49017A1/en
Application grantedgrantedCritical
Publication of SU49017A1publicationCriticalpatent/SU49017A1/en