October 02, 2026
The Third Circuit went out of its way to say its ruling against a defunct legal research startup was not a generative artificial intelligence case, but copyright lawyers expect the reach of its reasoning to be tested almost immediately in pending AI litigation.
September 30, 2026
The Third Circuit said the first appellate fight over artificial intelligence training and fair use ultimately came down to an "ordinary copyright case," affirming that Ross Intelligence infringed Thomson Reuters' Westlaw headnotes when it used them to train a competing legal research platform.
September 29, 2026
The Third Circuit on Tuesday upheld Thomson Reuters' victory against Ross Intelligence Inc. in the first U.S. appellate ruling to address whether artificial intelligence training can be fair use of copyrighted material, upholding a Delaware federal court's decision that the startup infringed Westlaw headnotes by using material derived from them to develop an AI-powered legal search tool.
September 10, 2026
Thomson Reuters told the Third Circuit Thursday in defunct legal tech startup Ross Intelligence's interlocutory appeal of a summary judgment ruling that it infringed Westlaw headnotes that a statement by the U.S. Department of Justice flagged by Ross does not support its fair-use defense.
July 22, 2026
An appeal over whether an AI-powered legal research tool unlawfully used Westlaw material and a long-running fight involving a Miles Davis tattoo could produce some of 2026's most significant copyright rulings. Here is Law360's list of the most notable copyright cases to watch for the rest of the year.
June 12, 2026
The Third Circuit's first major encounter with artificial intelligence and fair use did not turn on futuristic hypotheticals, with a three-judge panel instead posing questions that have long defined copyright disputes over new technologies: what was copied, why was it used, and whether the new product served a different purpose or competed with the original.
June 11, 2026
A Third Circuit panel grilled ROSS Intelligence's attorney Thursday over whether the defunct legal tech startup's use of Westlaw headnotes to train an artificial intelligence-powered legal research tool was truly transformative, repeatedly asking counsel to explain how the product differed from Westlaw.
June 01, 2026
A copyright fight over the future of AI‑powered legal research heads to the Third Circuit, where a legal publisher will argue this month that a legal technology company's use of its headnotes does not constitute fair use of copyrighted material. The court will also take up a challenge to New Jersey's firearm nuisance law in a case that asks when a trade group can bring a federal suit over a state statute.
March 13, 2026
An artificial-intelligence-based legal search engine appealing a finding that its use of Thomson Reuters' Westlaw headnotes did not constitute fair use has pointed to arguments in a separate case it says supports the idea that AI training is connected to national security.
January 02, 2026
U.S. federal courts this year will continue to review consequential copyright infringement suits involving artificial intelligence, while appeals court decisions remain pending in a pair of notable fair use cases involving ROSS Intelligence and Microsoft. Here are Law360's picks for copyright cases to watch in 2026.