Atty. Thomas David Rein

Atty. Thomas David Rein

Thomas David Rein is a lawyer practicing intellectual property litigation, antitrust & trade law, counseling and 7 other areas of law. Thomas received a B.A. degree from Colgate University in 1980, and has been licensed for 43 years.

Chicago Chicago 43 yrs experience 43 year
Call (224) 801-3606 Book Appointment

Profile Summary

About Thomas David Rein at a glance

Thomas David Rein is a Partner based in Chicago, Illinois, practicing at Sidley Austin LLP. They have 43+ years of legal experience, licensed to practice since 1983. Their practice focuses on patent, contracts, ip, breach of contract, and trade secrets. Admitted to practice in Illinois (1983), U.S. District Court, Northern District of Illinois (1985), U.S. District Court, Northern District of Illinois, including Trial Bar (1989), and U.S. Court of Appeals, Seventh Circuit (1992). Educated at Harvard Law School (J.D., 1983) and Colgate University (B.A. Mathematical, 1980). Recognitions include AV Preeminent. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas David Rein is a lawyer practicing intellectual property litigation, antitrust & trade law, counseling and 7 other areas of law
  • Thomas received a B.A. degree from Colgate University in 1980, and has been licensed for 43 years
  • Thomas practices at Sidley Austin LLP in Chicago, IL

Practice Areas Explained

Thomas David Rein's Areas of Practice

Each practice area below reflects the types of cases Thomas David Rein handles, with a brief overview of what that area of law covers.

Patent Law

Thomas David Rein is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Illinois →

Contracts

Thomas David Rein is one of 76,762 contracts attorneys indexed nationally. Browse contracts attorneys in Illinois →

Intellectual Property

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

Thomas David Rein is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Illinois →

Breach of Contract

Thomas David Rein is one of 5,938 breach of contract attorneys indexed nationally. Browse breach of contract attorneys in Illinois →

Trade Secrets

Thomas David Rein is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets 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 Thomas David Rein

Where is Thomas David Rein's law office located?
Thomas David Rein's law practice is located in Chicago, Illinois. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does Thomas David Rein handle?
Thomas David Rein focuses on patent, contracts, ip, breach of contract, trade secrets. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Thomas David Rein practiced law?
Thomas David Rein has 43+ years of legal experience and has been licensed since 1983.
Where did Thomas David Rein go to law school?
Thomas David Rein earned their education at (J.D., 1983); (B.A. Mathematical, 1980).
How can I contact Thomas David Rein for a consultation?
You can contact Thomas David Rein 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 Thomas David Rein received?
Thomas David Rein's notable recognition includes: AV Preeminent.

Education

J.D.
Harvard Law School
- 1983
B.A. Mathematical
Colgate University
- 1980

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1983
U.S. District Court, Northern District of Illinois
Admitted: 1985
U.S. District Court, Northern District of Illinois, including Trial Bar
Admitted: 1989
U.S. Court of Appeals, Seventh Circuit
Admitted: 1992
U.S. Court of Appeals, Federal Circuit
Admitted: 1994
U.S. District Court, Eastern District of Michigan and U.S. District Court, Eastern District of Wisco
Admitted: 1996

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