Edward H. Phillips v. AWH Corporation

Amicus Brief of the United States and the Federal Trade Commission addressing the proper methodology for construing the claims of a patent. This brief was filed in response to an order of the Court of Appeals for the Federal Circuit taking the case en banc and inviting the government to submit its views on the questions of the en banc order. The brief argues that in construing patent claims a court should primarily rely on a patent’s intrinsic evidence (its description of the invention and its prosecution history) rather than dictionaries and other external sources. This approach is more likely to result in claim constructions that are closer to those used by the Patent Office in issuing patents and that reflect the inventions as described and enabled.