Nearly four months ago, the Federal Circuit for the first time addressed the applicability of the Takings Clause of the Fifth Amendment to IPRs, holding in Celgene Corp v. Peter “that the retroactive application of inter partes review (IPR) proceedings to pre-America Invents Act (AIA) patents is not an unconstitutional taking under the Fifth Amendment” Celgene Corp. v. Peter, 931 F.3d 1342, 1362 (Fed. Cir. 2019). Since then, the court has continued to reject similar Patent Trial and Appeal Board (PTAB)-related Takings Clause claims on the merits. E.g., Collabo Innovations v. Sony Corp., No. 2018-1311 (Fed. Cir. Aug. 5, 2019). Unsurprisingly, Celgene filed a request for an en banc rehearing, and the government has just this week filed its response. Both Celgene’s en banc petition and the government’s response address the merits of Celgene’s constitutional claim—but as we hinted at in an earlier article analyzing the Celgene decision, there is a serious question whether the Federal Circuit should have even reached the merits of the Takings Clause issue in its panel opinion. In light of Supreme Court Takings Clause precedent, the Federal Circuit may want to either request supplemental briefing to decide whether it should have addressed the constitutional question in the first place, or potentially even revise the panel opinion and leave this issue to be decided in another case.
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