Most of the decisions arising from the inter partes review (IPR) process used in the U.S. patent system are the final word on the related patent dispute, but Guardant Health Inc., managed to at least temporarily reverse such an outcome recently. The Court of Appeals for the Federal Circuit reversed an IPR determination that 16 claims found in a patent held by Guardant were obvious and kicked the case back to the Patent Trial and Appeal Board (PTAB) for further consideration, but the affected patent is not clear of an adverse determination just yet.