1. Whether the Patent Act's fee-shifting statute allows a district court discretion to impose joint and several liability for the fee award on a party's attorney whose actions substantially contribute to the exceptionality of the case.

2. Whether the same fee-shifting statute allows a district court discretion to award attorney's fees incurred by a prevailing accused infringer in a parallel administrative proceeding to invalidate a patent.

Whether the Patent Act's fee-shifting statute allows a district court discretion to impose joint and several liability for attorney fees and to award fees from parallel administrative proceedings