Fortress Iron, LP v. Digger Specialties, Inc., No. 24-2313 (Fed. Cir. Apr. 2, 2026)

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

Fortress Iron, LP (“Fortress”) appeals from a decision of the United States District Court for the Northern District of Indiana. Fortress Iron L.P. v. Digger Specialties, Inc., 748 F. Supp. 3d 614, 621 (N.D. Ind. 2024) (“Decision”). The district court granted summary judgment , holding that U.S. Patents 9,790,707 (“the ’707 patent”) and 10,883,290 (“the ’290 patent”) were invalid because they omitted a coinventor. Id. The district court also denied partial summary judgment to correct inventorship under 35 U.S.C. § 256(b). Id.