Mark A. Hannemann

Mark A. Hannemann is an experienced patent litigator focusing on high-stakes patent and trade secret disputes, primarily representing multinational operating companies as a defendant. His technical experience encompasses a broad range of technologies, including LED packaging, UX designs, networking protocols, MEMS devices, automotive systems, elliptic-curve cryptography, medical devices, and SaaS systems. His practice also extends to areas such as integrated circuits, as seen in cases like Advanced Integrated Circuit Process LLC v. United Microelectronics Corporation.

Mr. Hannemann is a Partner at Troutman Pepper Locke. His career includes prior partnerships at Kenyon & Kenyon and Shearman & Sterling, and an appearance with Hunton Andrews Kurth. He has significant first-chair experience in bench trials, jury trials, International Trade Commission (ITC) investigations, and Patent Office proceedings.

Key representations include acting as lead defense counsel for OSRAM in an industry-wide ITC investigation concerning LED technology, which resulted in an initial determination of patent noninfringement and invalidity. He also secured a landmark Federal Circuit decision for Robert Bosch LLC in a windshield-wiper patent enforcement campaign and obtained a settlement for SS&C in trade secret litigation. More recently, he is representing United Microelectronics Corporation as a defendant in Advanced Integrated Circuit Process LLC v. United Microelectronics Corporation. Mr. Hannemann maintains an active practice before the Patent Trial and Appeal Board (PTAB).

He earned his J.D. from Columbia Law School and his B.A. from Grinnell College. He is admitted to the bar in New York and practices before the U.S. Court of Appeals for the Federal Circuit and the U.S. Court of Appeals for the Second Circuit, among other federal district courts.