Atty. John Henry Quinn

Atty. John Henry Quinn

John Henry Quinn is a lawyer practicing intellectual property services, non-compete/trade secrets, business litigation and 6 other areas of law. John Henry received a M.A.T. degree from Harvard Graduate School of Education in 1972, and has been licensed for 51 years.

St. Louis St. Louis 51 yrs experience 51 year
Call (309) 718-8598 Book Appointment

Profile Summary

About John Henry Quinn at a glance

John Henry Quinn is a Partner based in St. Louis, Missouri, practicing at Armstrong Teasdale LLP. They have 51+ years of legal experience, licensed to practice since 1975. Their practice focuses on personal injury, business, ip, trade secrets, and employment contracts. Admitted to practice in Missouri (1975) and Nevada (2007). Educated at University of Virginia School of Law (J.D., 1975) and Harvard Graduate School of Education (M.A.T. Infantry, 1972). Recognitions include AV Preeminent. Serands clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Henry Quinn is a lawyer practicing intellectual property services, non-compete/trade secrets, business litigation and 6 other areas of law
  • John Henry received a M.A.T. degree from Harvard Graduate School of Education in 1972, and has been licensed for 51 years
  • John Henry practices at Armstrong Teasdale LLP in St. Louis, MO

Practice Areas Explained

John Henry Quinn's Areas of Practice

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

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

John Henry Quinn is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in Missouri →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John Henry Quinn is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Intellectual Property

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

John Henry Quinn is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Missouri →

Trade Secrets

John Henry Quinn is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets attorneys in Missouri →

Employment Contracts

John Henry Quinn is one of 7,721 employment contracts attorneys indexed nationally. Browse employment contracts attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Louis are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri 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 Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about John Henry Quinn

Where is John Henry Quinn's law office located?
John Henry Quinn's law practice is located in St. Louis, Missouri. The firm is Armstrong Teasdale LLP. You can contact the office directly through this profile page.
What practice areas does John Henry Quinn handle?
John Henry Quinn focuses on personal injury, business, ip, trade secrets, employment contracts. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has John Henry Quinn practiced law?
John Henry Quinn has 51+ years of legal experience and has been licensed since 1975.
Where did John Henry Quinn go to law school?
John Henry Quinn earned their education at (J.D., 1975); (M.A.T. Infantry, 1972).
How can I contact John Henry Quinn for a consultation?
You can contact John Henry Quinn 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 Henry Quinn received?
John Henry Quinn's notable recognition includes: AV Preeminent.

Education

J.D.
University of Virginia School of Law
- 1975
M.A.T. Infantry
Harvard Graduate School of Education
- 1972

Awards

AV Preeminent

Bar Admissions

Missouri
Admitted: 1975
Nevada
Admitted: 2007

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