PS

Paul D. Spaulding

NV National Oilwell Varco: 1 patents #240 of 551Top 45%
Overall (All Time): #3,255,624 of 4,157,543Top 80%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7975392 Downhole tool — 2011-07-12