Apple Scores Win at CAFC in Split Ruling on Prosecution Laches
The U.S. Court of Appeals for the Federal Circuit (CAFC) ruled today in a split precedential decision authored by Judge Reyna that a district court properly found Personalized Media Communications’ (PMC) patent unenforceable due to prosecution laches. Judge Stark dissented, arguing that, although he agreed PMC’s delay in prosecuting its patent was “unreasonable and inexcusable,” Apple failed to establish that it suffered prejudice during the period of delay. PMC sued Apple in the U.S. District Court for the Eastern District of Texas in 2015, alleging that Apple’s digital rights management software, FairPlay, infringed claim 13 of PMC’s U.S. Patent No. 8,191,091. A jury found that Apple infringed at least one of claims 13-16, but in a subsequent bench trial the district court found that the patent was unenforceable due to prosecution laches under Hyatt v. Hirshfeld.