Are Patents Free for the Taking; or Does the Law Require Just Compensation?
This is a super interesting patent-as-property case. In 2018, Christy filed a class-action lawsuit asserting that the cancellation of its patent via Inter Partes Review was taking subject to the due process requirements of the Constitution as well as the Fifth Amendment requirement of “Just Compensation.”
The Federal Circuit offered a very low quality opinion on the issues here. In particular, the Federal Circuit simply stated that it was bound by a prior decision holding that “cancellation of patent claims in [an] inter partes review cannot be a taking under the Fifth Amendment.”