Ren-How Harn
Partner, Intellectual Property
Ren-How Harn is a partner in the 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 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.
Ren-How Harn was selected as a 2023 Leadership Council on Legal Diversity (LCLD) Fellow and he also participated in the LCLD 2021 Pathfinder Program. He cares deeply about diversity, equity, and inclusion in the legal profession. In addition to being the co-chair of the office’s Affinity Group and being a member of the firm’s Inclusion and Engagement Committee, Ren-How is deeply involved in associate recruitment and retention as a co-chair of the Willkie Chicago summer associate program.
Experience
- Lawdragon, 500 Leading Global IP Lawyers, 2025
- Benchmark Litigation – 40 & Under List – Dispute Resolution (2024)
- Best Lawyers in America: Ones to Watch - Litigation - Patent (since 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. Ren-How is a member of the Richard Linn American Inn of Court.
- 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
Credentials
Education
Cardozo School of Law, J.D., 2015 University of Kansas, B.S., 2012
Bar Admissions
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