Mark J. Nahnsen is a partner in the Chicago office of Barnes & Thornburg and a member of the Intellectual Property Department. Mark represents and counsels individuals and corporations on patent, trademark, copyright and trade secret matters and on foreign and domestic patent and trademark protection.
Mark's practice focuses on patent and trademark counseling, intellectual property licensing, preparing and prosecuting domestic and international patent and trademark applications, the development and maintenance of patent and trademark portfolios and intellectual property litigation. His practice also encompasses patent infringement and invalidity analysis, product clearance and legal opinion work. Mark also is experienced in negotiating contracts and intellectual property licenses.
Credentials
Education
- John Marshall Law School, J.D., 1999
- Purdue University, B.S., 1994
Bar Admissions
- Illinois
- U.S. Patent and Trademark Office
Court Admissions
- Illinois Northern District Court