Atty. Mark J. Liss
Mr. Liss is experienced in trademark, copyright, trade secret and unfair competition counseling and litigation.
Profile Summary
About Mark J. Liss at a glance
Mark J. Liss is a trademark and ip attorney based in Chicago, Illinois, practicing at Leydig, Voit & Mayer LTD. They have 45+ years of legal experience, licensed to practice since 1981. Admitted to practice in Illinois (1981). Educated at Chicago-Kent College of Law at IIT (J.D., 1981). Recognitions include Best Lawyers in America — Litigation - Intellectual Property (2026), Best Lawyers in America — Trademark Law (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in Chicago, IL and the surrounding metropolitan area.
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About
- Mr. Liss is experienced in trademark, copyright, trade secret and unfair competition counseling and litigation
- He has significant experience in complex inter partes proceedings before the Trademark Trial and Appeal Board (TTAB), and has represented numerous clients in federal courts around the U.S
- Mr. Liss represents clients in a wide variety of industries including health care, consumer goods and products, insurance and financial services, industrial and commercial products and online retail sales
- Much of his practice is in litigation and trademark counseling
- He has represented clients in lawsuits throughout the United States and inter-parties Trademark Office proceedings
- He has acted as first chair in numerous trials and Trademark Office contested matters
- In addition to his litigation practice, Mr. Liss has extensive experience in trademark counseling
- For example, he has provided detailed counseling, search advice and protectability opinions regarding global name trademark availability and protection issues
- In fact, he has provided detailed consulting services in connection with spin-offs from Fortune 100 companies who were forming new and independent companies on a worldwide basis
Practice Areas Explained
Mark J. Liss's Areas of Practice
Each practice area below reflects the types of cases Mark J. Liss handles, with a brief overview of what that area of law covers.
Mark J. Liss is one of 23,222 trademark attorneys indexed nationally. Browse trademark attorneys in Illinois →
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
Mark J. Liss is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Illinois →
Jurisdictional Context
Why local counsel matters in Illinois
Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.
Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.
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