American Well Works Company v. Layne and Bowler Company

Background

A company that makes and sells a pump sued in state court after competitors told customers the pump infringed the competitors’ patent and threatened to sue sellers and buyers. The company alleged false and malicious statements, claimed $50,000 in actual damages and $50,000 punitive damages, and said it owned or had applied for a patent. The case was removed to federal court, and the federal court dismissed it as a suit arising under the patent laws.

Reasoning

The Court examined whether the claim is created by federal patent law or by state law. It explained that the wrong alleged is business injury caused by false statements or threats, which is governed by the State’s law that creates the cause of action. Whether the defendant can justify the statements by proving a patent’s validity or infringement is a defense, not part of the plaintiff’s core claim. Therefore the lawsuit does not “arise under” the federal patent laws simply because patent issues might come up in a defense. The Court reversed the federal dismissal.

Real world impact

The decision means businesses can pursue state-law claims for reputational or business losses after patent-related threats or accusations without those claims being treated automatically as federal patent suits. The ruling does not decide whether any patent is valid or whether infringement occurred; those matters remain defenses for the defendant to raise in the state proceeding.

Dissents or concurrances

Justice McKenna dissented, believing the case presented a direct and substantial controversy under the patent laws and thus implicated federal authority.