Tesco Oil Drilling Tool Patents Ruled Invalid

Law360, New York (December 6, 2012, 9:23 PM EST) -- A Texas federal judge on Thursday found two Tesco Corp. patents for an oil drilling tool invalid, saying the one supposedly novel aspect of the invention was an obvious solution to an established problem within the field.

U.S. District Judge Keith P. Ellison awarded summary judgment to National Oilwell Varco LP, Offshore Energy Services Inc. and Frank’s Casing Crew & Rental Tools Inc. in Tesco's suit accusing them of violating patents related to a casing drive system used in the oil industry to pick up, rotate...
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