Barry L. Refsin represents clients in complex commercial litigation including antitrust, software licensing disputes, and intellectual property litigation.

He has represented some of the country’s largest chain drug stores as plaintiffs in a variety of antitrust cases challenging pricing and exclusionary practices of brand name pharmaceutical manufacturers. Mr. Refsin also frequently represents technology companies in licensing and patent disputes.

Honors & Awards


Named a Leader in Antitrust by Chambers USA: America’s Leading Lawyers for Business, 2021

Selected for inclusion in Pennsylvania Super Lawyers magazine as one of the state’s top attorneys as the result of a statewide survey of lawyers (2005,  2018 – Present)

University of Pennsylvania Law Review, Executive Editor, 1990 – 1991

University of Pennsylvania Law Review, Associate Editor, 1989 – 1990


“Proving Market Power in Patent Tying Cases After Illinois Tool Works,” Intellectual Property Supplement, The Legal Intelligencer, May 2006

“Antitrust Concern in B2B Exchanges,” Business to Business Internet Exchanges, Aspen, 2002