USA: Schoeller-Bleckmann Oilfield Equipment AG v. Churchill Drilling Tools US, Inc, United States Court of Appeals, Federal Circuit, No. 2016-1494, 9 November 2016
The Patent Trial and Appeal Board properly found during inter partes review (IPR) that two claims of a patent directed to a mechanism for controlling the operation of a downhole drill string were invalid as anticipated by a prior art reference, the U.S. Court of Appeals for the Federal Circuit has decided. The court rejected…