Holmes Group, Inc. v. Vornado Air Circulation Systems, Inc.

```json { "summary": "The Supreme Court ruled that the Court of Appeals for the Federal Circuit lacks jurisdiction over a case where the only patent law issues appear in a defendant's counterclaim rather than the plaintiff's original complaint. The decision reinforced the \"well-pleaded complaint rule,\" establishing that federal patent jurisdiction depends solely on the claims asserted by the plaintiff.", "questionPresented": "Does the Court of Appeals for the Federal Circuit have appellate jurisdiction over a case in which the complaint does not allege a claim arising under federal patent law, but the answer contains a patent-law counterclaim?" } ```