Littelfuse, Inc. v. Mersen USA EP Corp., No. 21-2013 (Fed. Cir. Apr. 4, 2022)

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.

Appellant Littelfuse , Inc., brought a patent infringe- ment action against appellee Mersen USA EP Corp. After the district court construed the patent claims, the parties stipulated to a judgment of non- infringement. Littelfuse now appeals the district court’s claim constructi ons. We vacate and remand. I A Littelfuse alleges that Mersen infringes U.S. Patent No. 9,564,281 (“the ’281 patent”). The ’281 patent is di- rected to a “fuse end cap for providing an electrical connec- tion between a fuse and an electrical conductor.” ’2 81 patent, Abstract.