NE

Nikolai S. Efremovtsev

Overall (All Time): #4,049,816 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4377310 Method of underground working of ore deposits and handling ore Ivan P. Gubin, Sergei G. Machavariani, Viktor A. Kovalenko, Alexandr V. Mozolev, Sergei Nikolaev +8 more 1983-03-22