Duane Morris & Selvam

Duane Morris & Selvam is a joint law venture headquartered in Singapore, formed by international law firm Duane Morris LLP and Singapore-based Selvam LLC. Duane Morris LLP, the larger entity, is a full-service BigLaw firm headquartered in Philadelphia, Pennsylvania, with approximately 742-750 attorneys across 29 offices in the United States, Europe, and Asia. In 2025, Duane Morris LLP was ranked 82nd on the Am Law 200 based on gross revenue and 74th on the National Law Journal's NLJ 500 ranking by size.

The firm's patent litigation practice covers a broad range of complex technologies, including biotechnology, pharmaceuticals (including Hatch-Waxman matters), medical devices, computer systems and software, telecommunications equipment, electronics, and semiconductors. While the firm's practice description indicates it represents both plaintiffs and defendants in intellectual property litigation, its notable tracked patent litigation engagements, such as those involving Kangxi Communication Technologies and Grand Chip Labs, showcase its defense capabilities.

A significant recent outcome involved Duane Morris & Selvam defending Kangxi Communication Technologies (Shanghai) Co., Ltd. and its subsidiary Grand Chip Labs Inc. against patent infringement claims and a Section 337 investigation initiated by Skyworks Solutions Inc. and its affiliates. In January 2026, the U.S. International Trade Commission (ITC) issued an Initial Determination finding that Kangxi did not infringe Skyworks' patents, leading Skyworks to subsequently drop all related claims in the ITC and U.S. District Court for the Central District of California. The firm's IP litigators have also been involved in cases that have helped define intellectual property rights, including decisions from the U.S. Supreme Court and the Court of Appeals for the Federal Circuit.

Duane Morris also maintains a robust practice before the Patent Trial and Appeal Board (PTAB). The firm has been recognized as a top firm representing petitioners before the PTAB, according to Unified Patents' institutional success index from 2018-2025. It also boasts one of the highest IPR institution percentages among the nation's most active petitioner law firms.

Key attorneys in the firm's IP litigation practice include Dr. Li Zheng, a Director in the Intellectual Property Practice Group at the Shanghai office, who focuses on U.S. patent law, litigation, and ITC 337 investigations, and was instrumental in the Kangxi Communication defense. Leon Yee serves as the Chairman of Duane Morris & Selvam. The broader IP practice group at Duane Morris LLP is chaired by Louis Norwood Jameson, with Christiane Schuman Campbell and Matthew Gaudet serving as vice chairs.