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Mengmeng Du

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Mengmeng Du is an associate in the Intellectual Property Practice Group in the firm's Silicon Valley office.

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Jiaxing Super Lighting Elec. Appliance Co. Ltd. v. CH Lighting Tech. Co., Ltd., No. 23-1715 (Fed. Cir. 2025) – On July 28, 2025, the Federal Circuit issued a decision affirming in part, reversing in part, vacating in part, and remanding the case. Specifically, the Federal Circuit reversed the district court’s grant of JMOL of invalidity in favor of the patent owner, Super Lighting, finding that the district court abused its discretion in excluding CH’s relevant evidence pertaining to establishing the on-sale bar. As a result, the case was remanded for a new trial on validity of the patents.Continue Reading Erroneous Exclusion of On-Sale Bar Evidence: Federal Circuit Revives Invalidity Challenge in Super Lighting v. CH Lighting Patent Dispute

AliveCor, Inc. v. Apple, Inc., No. 23-1512 (Fed. Cir. 2025) – On March 7, 2025, the Federal Circuit affirmed the Patent Trial and Appeal Board’s inter partes review (“IPR”) decisions invalidating all claims of three AliveCor patents. Previously, the International Trade Commission (“ITC”) had found certain Apple Watch products infringe two of the three patents. Continue Reading You Snooze, You Lose: Federal Circuit Emphasized Once Again the Importance of Preserving Issues for Appellate Review