Ren-How Harn is a partner in the firm’s Intellectual Property Department. With a background in chemical engineering, Ren-How litigates and counsels in a wide variety of technologies, including biotechnology, material science, wireless, and mechanical technologies. Ren-How has experience in all facets of litigation, including pre-litigation investigation, case analysis and management, and post-trial briefing and appeals. In addition to litigation, Ren-How also assists clients with competitive patent portfolio analysis and counseling.

Ren-How also frequently represents clients before the Patent Trials and Appeals Board in various post-grant proceedings, including inter partes reviews and interference proceedings. In addition to Ren-How’s PTAB practice, he also regularly represents clients in Hatch-Waxman litigation.


  • Best Lawyers in America: Ones to Watch - Litigation - Patent (2024)

Ren-How Harn was selected as a 2023 Leadership Council on Legal Diversity (LCLD) Fellow. The LCLD Fellows Program connects high-potential attorneys with general counsel and managing partners for a year-long, multi-tiered professional development series.  The program is designed to increase diversity at the leadership levels of the nation’s top law firms and corporate legal departments.  Ren-How also participated in the LCLD 2021 Pathfinder Program.

  • Lead attorney successfully representing the patent owner in a USPTO Interference proceeding in obtaining a favorable judgment
  • Argued before the PTAB in various hearings and proceedings
  • Key member of trial team for leading pharmaceutical company



Cardozo School of Law, J.D., 2015 University of Kansas, B.A., 2012

Bar Admissions

Illinois, 2015

Court Admissions

United States District Court, Northern District of Illinois, 2015 United States Court of Appeals, Federal Circuit, 2017 United States District Court, Eastern District of Michigan, 2018