RC

Robert Cai

NV National Oilwell Varco: 1 patents #240 of 551Top 45%
Overall (All Time): #2,945,256 of 4,157,543Top 75%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9650840 Method and apparatus for erecting a drilling rig Rui Cheng 2017-05-16