1. Whether a court of appeals can invoke forfeiture to refuse to address an Appointments Clause violation in a pending appeal despite an intervening change in law.

2. Whether the PTAB exceeded its statutory authority under the Leahy-Smith America Invents Act and deprived Customedia of due process when the PTAB changed the petitioner's asserted grounds for review in the final written decision.

3. Whether claims to computer systems reciting the addition of specific computer hardware, which alters and interferes with the conventional operation of the computer system, are directed to patent-eligible subject matter within the meaning of 35 U.S.C § 101.

Whether a court of appeals can invoke forfeiture to refuse to address an Appointments-Clause-violation