Atty. John Claiborne Koski

Atty. John Claiborne Koski

John Claiborne Koski is a lawyer practicing litigation, appeals, antitrust & trade law and 2 other areas of law. John received a B.A. degree from Vanderbilt University in 1989, and has been licensed for 34 years.

Chicago Chicago 34 yrs experience 34 year
Call (872) 270-8529 Book Appointment

Profile Summary

About John Claiborne Koski at a glance

John Claiborne Koski is a Partner based in Chicago, Illinois, practicing at Dentons US LLP. They have 34+ years of legal experience, licensed to practice since 1992. Their practice focuses on ip, class action, litigation, and appellate. Admitted to practice in Illinois (1992), U.S. District Court, Northern District of Illinois (1992), Florida (1993), and U.S. Court of Appeals, Seventh Circuit (1994). Educated at University of Miami (J.D., 1992) and Vanderbilt University (B.A., 1989). Active member of Illinois State and American Bar Associations The Florida Bar. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Claiborne Koski is a lawyer practicing litigation, appeals, antitrust & trade law and 2 other areas of law
  • John received a B.A. degree from Vanderbilt University in 1989, and has been licensed for 34 years
  • John practices at Dentons US LLP in Chicago, IL

Practice Areas Explained

John Claiborne Koski's Areas of Practice

Each practice area below reflects the types of cases John Claiborne Koski handles, with a brief overview of what that area of law covers.

Intellectual Property

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

John Claiborne Koski is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Illinois →

Class Action

John Claiborne Koski is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in Illinois →

Civil Litigation

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

John Claiborne Koski is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Illinois →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

John Claiborne Koski is one of 86,319 appellate attorneys indexed nationally. Browse appellate 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 John Claiborne Koski

Where is John Claiborne Koski's law office located?
John Claiborne Koski's law practice is located in Chicago, Illinois. The firm is Dentons US LLP. You can contact the office directly through this profile page.
What practice areas does John Claiborne Koski handle?
John Claiborne Koski focuses on ip, class action, litigation, appellate. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has John Claiborne Koski practiced law?
John Claiborne Koski has 34+ years of legal experience and has been licensed since 1992.
Where did John Claiborne Koski go to law school?
John Claiborne Koski earned their education at (J.D., 1992); (B.A., 1989).
How can I contact John Claiborne Koski for a consultation?
You can contact John Claiborne Koski 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.

Education

J.D.
University of Miami
- 1992
B.A.
Vanderbilt University
- 1989

Bar Admissions

Illinois
Admitted: 1992
U.S. District Court, Northern District of Illinois
Admitted: 1992
Florida
Admitted: 1993
U.S. Court of Appeals, Seventh Circuit
Admitted: 1994
U.S. Court of Appeals, Third Circuit
Admitted: 1995
U.S. Supreme Court
Admitted: 1996
U.S. District Court, Eastern District of Michigan and U.S. District Court, Northern District of Illi
Admitted: 1997
U.S. Court of Appeals, Second Circuit
Admitted: 1999
U.S. District Court, Eastern District of Wisconsin
Admitted: 2000

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