Held, that the District court erred as a matter of law in finding Prometheus's asserted medical treatment claims to be drawn to no nstatutory subject matter under this court's machine-or-transformation test, which was held in In re Bilski.
To be the definitive test for determining the patentability of a process under § 101.The Supreme Court held that the machine-or-transformation test, although "a useful and important clue," was not the sole test for determining the patent eligibility of process claims. The judgment of the district court was reversed and remanded to the court with instructions to deny Mayo's motion for summary judgment that the asserted claims are invalid under § 101.
