Click-to-Call Technologies, LP- v. Ingenio, Inc., No. 22-1016 (Fed. Cir. 2022)
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In 2012, Click-to-Call sued several entities (including Ingenio) for infringement of its patent. Ingenio filed a petition for inter partes review (IPR) challenging the 16 asserted claims and one additional claim. While the petition was pending, the district court issued a Markman order construing certain claim terms and required plaintiffs to narrow their asserted claims to eight claims. Click-to-Call selected claims 1, 2, 8, 12, 13, 16, 26, and 27. The Board partially instituted IPR, found persuasive unpatentability grounds based on one reference, Dezonno, but refused to consider grounds based on another reference, Freeman. The Freeman grounds challenged asserted claim 27, whereas the Dezonno grounds did not. While appeal of the IPR was pending, the Supreme Court overruled the practice of partial institutions in “SAS” (2018). Ingenio never sought remand under SAS for the Board to consider Ingenio’s challenge to claim 27.
In post-IPR district court proceedings, Ingenio moved for summary judgment, arguing that the only asserted claim not finally held unpatentable in the IPR, claim 27, was invalid based on the same reference that Ingenio had used against the other asserted claims in its IPR petition—Dezonno. Click-to-Call unsuccessfully argued that Ingenio was estopped from pressing this invalidity ground against claim 27, citing IPR estoppel, 35 U.S.C. 315(e)(2). The Federal Circuit reversed and remanded. The district court erred in not applying IPR estoppel to claim 27 based on Dezonno.
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