Atty. Denis Alan Berntsen

Atty. Denis Alan Berntsen

Denis Alan Berntsen is a lawyer practicing counseling, litigation, prosecution and 4 other areas of law. Denis received a B.S.E.E. degree from University of Illinois, and has been licensed for 54 years.

Chicago Chicago 54 yrs experience 54 year
Call (312) 535-4941 Book Appointment

Profile Summary

About Denis Alan Berntsen at a glance

Denis Alan Berntsen is a patent, copyright, ip, and litigation attorney based in Chicago, Illinois. They have 54+ years of legal experience, licensed to practice since 1972. Admitted to practice in Illinois U.S. Court of Appeals, Federal Circui registered to practice before U.S. Patent and Tradema (1972) and Massachusetts (1985). Educated at University of Illinois College of Law J.D. (—) and University of Illinois B.S.E.E. (—). Recognitions include AV Preeminent. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Denis Alan Berntsen is a lawyer practicing counseling, litigation, prosecution and 4 other areas of law
  • Denis received a B.S.E.E. degree from University of Illinois, and has been licensed for 54 years
  • Denis practices in Chicago, IL

Practice Areas Explained

Denis Alan Berntsen's Areas of Practice

Each practice area below reflects the types of cases Denis Alan Berntsen handles, with a brief overview of what that area of law covers.

Patent Law

Denis Alan Berntsen is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Illinois →

Copyright Law

Denis Alan Berntsen is one of 17,495 copyright attorneys indexed nationally. Browse copyright attorneys in Illinois →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Denis Alan Berntsen is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Illinois →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Denis Alan Berntsen is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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.

Frequently Asked

Common questions about Denis Alan Berntsen

Where is Denis Alan Berntsen's law office located?
Denis Alan Berntsen's law practice is located in Chicago, Illinois. You can contact the office directly through this profile page.
What practice areas does Denis Alan Berntsen handle?
Denis Alan Berntsen focuses on patent, copyright, ip, litigation. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Denis Alan Berntsen practiced law?
Denis Alan Berntsen has 54+ years of legal experience and has been licensed since 1972.
Where did Denis Alan Berntsen go to law school?
Denis Alan Berntsen earned their education at (—); (—).
How can I contact Denis Alan Berntsen for a consultation?
You can contact Denis Alan Berntsen directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Denis Alan Berntsen received?
Denis Alan Berntsen's notable recognition includes: AV Preeminent.

Education

University of Illinois College of Law J.D.
- In Progress
University of Illinois B.S.E.E.
- In Progress

Awards

AV Preeminent

Bar Admissions

Illinois U.S. Court of Appeals, Federal Circui registered to practice before U.S. Patent and Tradema
Admitted: 1972
Massachusetts
Admitted: 1985

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