ROSS Says Anthropic Case Supports 3rd Circ. IP Appeal

Sunday, March 15, 2026iiplaeditorialSource: IIPLA
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ROSS Says Anthropic Case Supports 3rd Circ. IP Appeal

By Editorial Team

An artificial-intelligence-based legal search engine, ROSS Intelligence, is appealing a ruling that its use of Thomson Reuters' Westlaw headnotes did not constitute fair use. ROSS points to arguments in a separate case, citing that AI training is linked to national security.

ROSS Intelligence is backed by Anthropic PBC and is currently involved in an appeal at the U.S. Court of Appeals for the Third Circuit. The case involves a dispute over the use of Westlaw headnotes in ROSS's AI platform.

In its defense, ROSS has referenced a different case that it believes supports its argument. The company argues that the training of AI systems, like the one used in ROSS, is crucial for national security reasons.

The legal teams involved in the case include Kirkland & Ellis, Pillsbury Winthrop, and White & Case. Companies at the center of the dispute are Anthropic PBC, ROSS Intelligence, and Thomson Reuters Corp.

Legal experts are closely watching this case as it could have significant implications for the use of AI technology in the legal industry. The outcome of this appeal could potentially set a precedent for future cases involving AI and intellectual property rights.

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