By Andrew Karpan (January 21, 2022, 8:25 PM EST) — The Federal Circuit handed down a precedential decision on Friday that found a U.S. International Trade Commission judge made the wrong call in letting an engineer testify in Kyocera Corp.’s patent case without having any experience in the power drill industry, sending Kyocera’s case back to the ITC.

The ruling came down after a three-judge panel held an hour-long hearing in the case last November. In an opinion penned by Chief U.S. Circuit Judge Kimberly A. Moore, the court criticized several findings from Chief ITC Judge Charles Bullock, who oversaw a Section 337 case that Kyocera Senco Industrial Tools Inc. lodged…