Gregory F. Ahrens

  • Partner


Greg is in his thirty-seventh year of practicing intellectual property law. His expertise is concentrated in intellectual property litigation, and in that capacity he has handled more than a dozen jury trials, a multitude of appeals through the Federal Circuit Court of Appeals (from Federal Courts and an equal number of PTAB trials). Greg is also admitted to practice before the United States Patent and Trademark Office and the United States Supreme Court. Greg was named the Best Lawyers “Lawyer of the Year” for Intellectual Property Litigation in Cincinnati in 2018, 2021, and 2024 and is a Past President of the Cincinnati Chapter of the Federal Bar Association. 

Areas Of Practice

  • Litigation/Dispute Resolution
  • Post Grant Options at the PTBA
  • Patents
  • Chemicals/Materials Science
  • Trademarks

Bar Admissions

  • Ohio, 1987
  • Wisconsin, 1987
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals Federal Circuit
  • U.S. Court of Appeals 9th Circuit
  • U.S. Supreme Court


  • University of Wisconsin Law School, Madison, Wisconsin
    • J.D. – 1987
    • Law Journal: Wisconsin International Law Journal Managing Editor
  • University of Texas at Austin, Austin, Texas
    • Bachelor of Science – Chemical Engineering – 1983

Honors And Awards

  • Best Lawyers® Litigation - Intellectual Property ''Lawyer of the Year'' in Cincinnati, 2024
  • The Best Lawyers in America®, 2006 - 2024
  • Ohio Super Lawyers®, 2007 - 2024
  • Best Lawyers® Litigation - Patent ''Lawyer of the Year'' in Cincinnati, 2021
  • Best Lawyers® Litigation - Patents ''Lawyer of the Year'' in Cincinnati, 2018
  • Past President of the Cincinnati/Northern Kentucky Chapter of the Federal Bar Association

Professional Associations And Memberships

  • American Bar Association
  • Cincinnati Bar Association
  • Wisconsin Bar Association
  • American Intellectual Property Law Association
  • Cincinnati Intellectual Property Law Association
  • Federal Bar Association, Cincinnati/Northern Kentucky Chapter, Past President and Executive Committee member
  • Federal Circuit Bar Association

Pro Bono Activities

  • Volunteer Lawyers for the Poor Foundation, 1990 - Present

Fraternities / Sororities

  • Phi Alpha Delta