National Oilwell DHT, L.P. Trademarks
HYDROSHIFT
Fluid-activated multi-speed transmission for mud motors used in downhole drilling in the oil and gas industry
Owned by: National Oilwell DHT, L.P.
Serial Number: 78616928
QUADRIL
Downhole drilling tools, namely, downhole drilling motors for use in oil and gas wells
Owned by: National Oilwell DHT, L.P.
Serial Number: 85866243
