Mr. Petersen is an attorney practicing exclusively in the field of intellectual property law. He helps technology-focused companies find sensible solutions to challenging patent problems. He represents major corporations involved in patent litigation, having served as principal counsel at both the trial and appellate levels. Mr. Petersen’s clients also seek his assistance to negotiate patent licenses and resolve patent disputes on favorable terms. With the ability to readily grasp some of the most complex technologies, coupled with his more than 30 years of experience in the field, Mr. Petersen is uniquely able to provide clear and sound advice to decision makers faced with patent obstacles in their businesses.
Experience
Mr. Petersen’s cases have involved a variety of technologies such as factory automation, electronic medical records, encryption, displays, image processing, barcoding, semiconductor fabrication, orthodontic appliances and business process software. He is actively involved in counseling clients in the areas of electric infrastructure, telecommunications, insurance and financial services. Below are some examples of recent engagements:
- Petersen advised a client regarding various risks in connection with a major acquisition of a company involved in patent litigation.
- He represented a supplier of factory automation systems in a patent infringement lawsuit filed in Texas.
- He argued an appeal before the Federal Circuit for a client that prevailed in a case involving the alleged infringement of almost 500 patent claims.
- Petersen represented a major provider of health information solutions in numerous patent lawsuits brought by various non-practicing entities.
- He provided advice and counsel to a world-class client entering a new line of business in order to navigate through the patents of world-class competitors.
Before law school, Mr. Petersen was employed in industry as an engineer in the field of automotive electronics. Mr. Petersen presently serves as treasurer and a member of the board of the firm. He is actively involved in the legal community and various bar associations.
Honors
- AV® Preeminent™ Peer Review Rated (Highest Rating) – Martindale-Hubbell
- Named in the Illinois Super Lawyers list, Intellectual Property, 2009-2015, 2024-2025
- Selected by peers as a Leading Lawyer in Intellectual Property Law – Leading Lawyers Network
- Listed among the Top Lawyers in Illinois in Intellectual Property Law – Chicago Lawyer
Professional Affiliations
- American Intellectual Property Law Association (AIPLA)
- Intellectual Property Law Association of Chicago (IPLAC)
- Federal Circuit Bar Association
- Intellectual Property Owners Association (IPO)
Practices
Insights
- Leydig Attorneys Named 2025 Illinois Super Lawyers
January 21, 2025 - Leydig Attorneys Named 2024 Illinois Super Lawyers
February 1, 2024 - Leydig Attorneys Named 2020 Illinois Super Lawyers
January 26, 2020 - Leydig Attorneys Named 2019 Illinois Super Lawyers
January 25, 2019 - Leydig Attorneys Named 2018 Illinois Super Lawyers
January 25, 2018 - Leydig Attorneys Named in Illinois Super Lawyers and Rising Stars 2016 Lists
December 4, 2015 - Leydig Attorneys Named in Illinois Super Lawyers and Rising Stars 2015 Lists
January 16, 2015