Atty. John Edward Rosenquist

Atty. John Edward Rosenquist

John Edward Rosenquist is a lawyer practicing biotechnology, litigation, patents and 2 other areas of law. John received a M.S. degree from Creighton University in 1962, and has been licensed for 58 years.

Chicago Chicago 58 yrs experience 58 year
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Profile Summary

About John Edward Rosenquist at a glance

John Edward Rosenquist is a Counsel based in Chicago, Illinois, practicing at Leydig, Voit & Mayer, Ltd.. They have 58+ years of legal experience, licensed to practice since 1968. Their practice focuses on patent, trade secrets, and litigation. Admitted to practice in Illinois U.S. Supreme Court U.S. Court of Appeals for the Federal Circuit U.S. District Court, North (1968). Educated at John Marshall Law School (J.D., 1968) and Creighton University (M.S. Chemistry, 1962). Recognitions include AV Preeminent. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Edward Rosenquist is a lawyer practicing biotechnology, litigation, patents and 2 other areas of law
  • John received a M.S. degree from Creighton University in 1962, and has been licensed for 58 years
  • John practices at Leydig, Voit & Mayer, Ltd. in Chicago, IL

Practice Areas Explained

John Edward Rosenquist's Areas of Practice

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

Patent Law

John Edward Rosenquist is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Illinois →

Trade Secrets

John Edward Rosenquist is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets attorneys in Illinois →

Civil Litigation

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

John Edward Rosenquist 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 John Edward Rosenquist

Where is John Edward Rosenquist's law office located?
John Edward Rosenquist's law practice is located in Chicago, Illinois. The firm is Leydig, Voit & Mayer, Ltd.. You can contact the office directly through this profile page.
What practice areas does John Edward Rosenquist handle?
John Edward Rosenquist focuses on patent, trade secrets, litigation. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has John Edward Rosenquist practiced law?
John Edward Rosenquist has 58+ years of legal experience and has been licensed since 1968.
Where did John Edward Rosenquist go to law school?
John Edward Rosenquist earned their education at (J.D., 1968); (M.S. Chemistry, 1962).
How can I contact John Edward Rosenquist for a consultation?
You can contact John Edward Rosenquist 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 John Edward Rosenquist received?
John Edward Rosenquist's notable recognition includes: AV Preeminent.

Education

J.D.
John Marshall Law School
- 1968
M.S. Chemistry
Creighton University
- 1962

Awards

AV Preeminent

Bar Admissions

Illinois U.S. Supreme Court U.S. Court of Appeals for the Federal Circuit U.S. District Court, North
Admitted: 1968

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