Jeffrey B. Plies

Jeffrey B. Plies, co-chair of Dechert's Intellectual Property group, represents technology and medical device companies in patent litigation. As a former engineer for the U.S. Air Force Electronics Systems Center, the U.S. Army Materials Technology Laboratory, the Lawrence Livermore National Laboratory, and the MITRE Corporation, Mr. Plies’ diverse technical expertise includes direct working experience with technologies such as global positioning system, radar, and satellite communications, UHF/VHF/HF communications, missile guidance, aircraft avionics (e.g., FMS, INS, ILS, EFIS, TCAS, and IFF), heavy armor systems, rapid solidification, and aerospace alloy development.

Mr. Plies represents plaintiffs and defendants in patent litigation throughout the United States. Recently, he has represented clients in patent disputes involving medical devices (artificial heart valves, annuloplasty rings, and drug eluting coronary stents), video compression (MPEG), error correction algorithms for data storage devices, telephony modems, computer graphics, speech compression, computer I/O busses, IEEE 802.11 Wi-Fi, processing and scaling of TV video signals, flexible manufacturing/assembly systems, and Display Data Channel Command Interfaces (DDC/CI) for computer monitors.

Mr. Plies is routinely recognized by The Legal 500 US for Intellectual Property: Patents: Litigation (2020- 2023). Mr. Plies was recognized as a leading Intellectual Property lawyer by The Best Lawyers in America 2025.