Dario Machleidt is an intellectual property litigator. He has represented clients in a wide variety of complex matters, including patent, copyright, trademark, and trade secret disputes. His experience includes litigating patent cases before the U.S. Court of Appeals for the Federal Circuit and the U.S. Supreme Court. Most recently, Mr. Machleidt was a member of the team that obtained a $20.3 million jury verdict on behalf of Kilpatrick Townsend client Dr. Mark A. Barry. On November 11, 2016, in Mark A. Barry, M.D. v. Medtronic, Inc., an East Texas jury found that Medtronic willfully infringed Dr. Barry’s patents and rejected Medtronic’s invalidity defenses. Mr. Machleidt conducted a direct examination and cross-examined a Medtronic witness during the seven-day trial. The National Law Journal recognized the verdict as one of the “Top 100 Verdicts of 2016.”

Between March and April 2014, Mr. Machleidt served as a Special Deputy Prosecutor in the King County Prosecuting Attorney’s Office. He served as co-trial counsel in five felony jury trials. Mr. Machleidt selected juries, presented opening statements and closing arguments, and examined numerous witnesses during his time as a Special Deputy Prosecutor.

Prior to joining Kilpatrick Townsend, Mr. Machleidt worked as an associate in the Seattle office of a national law firm. While there, he played a critical role in Bowman v. Monsanto Co., a pro bono patent case that reached the U.S. Supreme Court. He was the only associate to chair the Supreme Court oral argument. During law school, Mr. Machleidt served as a judicial extern for Judge Randall R. Rader of the U.S. Court of Appeals for the Federal Circuit. He was also a Comments and Articles Editor of the Pacific Rim Law & Policy Journal.

Mr. Machleidt was recognized as a Washington “Rising Star” from 2012 to 2017 by Super Lawyers magazine. From 2011 to 2014, he received the Pro Bono Publico Service Commendation from the Board of Governors of the Washington State Bar Association. Mr. Machleidt actively participates in the Washington legal community and mentors at the University of Washington School of Law.

Professional & Community Activities

Seattle Intellectual Property American Inn of Court, Executive Committee Member (Director at Large)

Washington State Bar Association IP Section, Executive Committee Member (Director at Large)

Federal Circuit Bar Association, Member


  • University of Washington School of Law, J.D., Intellectual Property Concentration (2009)
    Pacific Rim Law & Policy Journal, Comments and Articles Editor
    Moot Court Honor Board, Member
    1L Moot Court Appellate Advocacy Competition, Champion
  • University of Washington, B.S., Physics (2006)
    cum laude, Phi Beta Kappa

Bar Admissions

  • Washington (2009)


  • U.S. Supreme Court
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court for the Western District of Washington
  • U.S. District Court for the Eastern District of Texas

Who We Are

What fully engaged means to me:

Dedication to the firm and its clients.

Suite 3700, 1420 Fifth Avenue
Seattle, WA, 98101
t +1 206.224.2857
f +1 206.374.2199

Dario A. Machleidt

Experience Highlights

Arizona State University v. Seattle Genetics
Summary Judgment Victory for Seattle Genetics in a technology licensing and breach of contract dispute involving a life-saving cancer therapy. After more
Mark A. Barry, M.D. v. Medtronic, Inc.
As lead trial counsel to the inventor and patent owner, obtained a verdict of willful infringement and an award of $20.3 for past damages after a more