By Kevin Emerson Collins, Associate Professor of Law, Indiana University Maurer School of Law—Bloomington [BIO][Articles][PDF Version of this Post]

Background: The Machine-or-Transformation Test of Bilski

Last fall, the Federal Circuit articulated the "machine-or-transformation" test for patent eligibility in its landmark case In re Bilski, 545 F.3d 943 (Fed. Cir. 2008) (en banc). It held that a method is eligible for patent protection only if it is either (a) limited to a "particular machine" or (b) responsible for transforming a "particular article" into a different state or thing. Id. at 954. Additionally, in a classic example of language that adds judicial wiggle room, the machine or transformation that satisfies either of these prongs "must impose meaningful limits on the claim's scope," it "must be central to the purpose of the claimed process," and it must not be part of "insignificant extra-solution activity" or a "mere data-gathering step." Id. at 961–62 (emphases added).   

The Supreme Court has accepted certiorari in Bilski, but the impending Supreme Court opinion has not stopped the Federal Circuit from issuing what is perhaps its most important case to date applying the machine-or-transformation test: Prometheus Laboratories, Inc. v. Mayo Collaborative Services. There have been two distinct types of claims that have taken center stage in recent debates over the section 101 doctrine of patent eligibility: "business methods" and what I will call "determine-and-infer methods." The claim at issue in Bilski describes a classic business method. In contrast, Prometheus involves a determine-and-infer method. The Federal Circuit's opinion in Prometheus opens a new window into the import of the machine-or-transformation test. Regardless of one's views of the soundness of Federal Circuit's reasoning in Prometheus, herein lies one of the opinion's greatest virtues. By issuing Prometheus before the Court's oral arguments in Bilski, the Federal Circuit has helped to clarify the stakes of the Court's decision to sanction, reformulate, or reject the machine-or-transformation test.