J. Pieter van Es

J. Pieter van Es


Chicago, IL

Main: 312.463.5000 Fax: 312.463.5001


Pieter has over 25 years of experience in intellectual property enforcement, counseling and procurement. He has worked on matters involving patent, trademark, trade dress, copyright, trade secret and antitrust issues.

Pieter has handled intellectual property disputes in trials and preliminary injunction hearings, conducted complex discovery and briefed successful motions and appeals. His experience has ranged from ex parte seizures of counterfeit goods to advantageous settlement of disputes in court supervised settlement hearings. He has procured and licensed patents and trademarks for clients in a wide variety of fields. The subject matter of his work has included electronic sensors and monitors, medical and diagnostic devices, audio electronics, telecommunications equipment, lighting fixtures, internet content delivery networks, processed food, healthcare products, sporting goods and software.

Pieter has been listed as an Illinois "Super Lawyer" every year since 2009. The Super Lawyers list represents the top 5 percent of Illinois lawyers, as chosen through peer nominations and evaluations, combined with independent research. Pieter was also recognized in Managing Intellectual Property's "IP Stars" list every year since 2017.  He is also listed as a “Leading Lawyer” by Law Bulletin Media.

Pieter taught intellectual property litigation as an adjunct professor of law at Northwestern Law School in Chicago and the Georgetown University Law Center in Washington, D.C. He earned a Bachelor of Science degree in Electrical Engineering and a Bachelor of Arts degree in Economics both from the University of Illinois at Urbana-Champaign in 1989. He graduated, magna cum laude, from the University of Illinois College of Law in 1992.

Pieter is a registered patent attorney and is admitted to practice in the states of Illinois and California. He also is admitted to practice before the Court of the Appeals for the Federal Circuit, numerous other federal courts and the Illinois Supreme Court.

  • University of Illinois at Urbana-Champaign
    1989, B.S., Electrical Engineering
    1989, B.A., Economics
  • University of Illinois College of Law
    1992, J.D.

Bar Admissions

  • 1992, Illinois
  • 2007, California

Court Admissions

  • Supreme Court of Illinois
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. District Court for the Northern District of Illinois
  • U.S. District Court for the Central District of California
  • U.S. District Court for the Northern District of California

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