Mirror Worlds Technologies, LLC v. Meta Platforms, Inc., decided 4 Dec 24

This CAFC opinion concerns a patent infringement lawsuit filed by Mirror Worlds Technologies against Meta Platforms (formerly Facebook). Mirror Worlds claimed that Facebook's News Feed, Timeline, and Activity Log features infringed on their patents for chronologically organizing data on a computer system. The district court granted summary judgment to Meta, finding no infringement. The appeals court affirmed this decision, upholding the district court's claim construction and finding insufficient evidence to demonstrate that Meta's systems met all the limitations of the patents at issue. Because the patents had expired, the court dismissed Meta's cross-appeal regarding patent invalidity.