International Trade Bulletin - Volume 1, Issue 14

In Fortress Iron, LP v. Digger Specialties, Inc., No. 24-2313 (Fed. Cir. Apr. 2, 2026), the U.S. Court of Appeals for the Federal Circuit reaffirmed what happens when a patent incorrectly lists the true inventors, and that error cannot be corrected under 35 U.S.C. § 256(b), which requires notice and a hearing for all “parties concerned.” In Fortress, the patent owner sought judicial correction to add an inventor under § 256(b), but that inventor could not be located. Because the missing inventor qualified as a “concerned” party under the statute, the lack of notice and a hearing for that inventor made correction under § 256(b) impossible, and the patents could not be saved from invalidity....