Atty. William Justin Barrow

Atty. William Justin Barrow

Mr. William Justin Barrow is a lawyer practicing antitrust / trade law, international law, administrative law and 4 other areas of law.

Washington Washington 18 yrs experience 18 year
Call (443) 909-4915 Book Appointment

Profile Summary

About William Justin Barrow at a glance

William Justin Barrow is an Associate based in Washington, District of Columbia, practicing at Mayer Brown Llp. They have 18+ years of legal experience, licensed to practice since 2008. Their practice focuses on patent, ip, government, and international. Admitted to practice in Maryland (2008), District of Columbia (2009), U.S. District Court for the Eastern District of Texas (2011), and U.S. District Court for the Eastern District of Michigan U.S. Patent and Trademark Office (2013). Educated at University of Pennsylvania (B.S. Electrical, 2004) and American University, Washington College of Law J.D. 2008 Senior Staff American University, Washington College of Law J.D. Administrative Law Review (—). Active member of Activities •American Intellectual Property Law Association •Federal Circuit Bar Association •ITC Trial Lawyers Association. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. William Justin Barrow is a lawyer practicing antitrust / trade law, international law, administrative law and 4 other areas of law
  • William received a B.S. degree from University of Pennsylvania in 2004, and has been licensed for 18 years
  • William practices at Mayer Brown LLP in Washington, DC

Practice Areas Explained

William Justin Barrow's Areas of Practice

Each practice area below reflects the types of cases William Justin Barrow handles, with a brief overview of what that area of law covers.

Patent Law

William Justin Barrow is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in District of Columbia →

Intellectual Property

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

William Justin Barrow is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in District of Columbia →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

William Justin Barrow is one of 132,225 government attorneys indexed nationally. Browse government attorneys in District of Columbia →

International Law

International law attorneys for cross-border transactions, trade, foreign investment, and treaties.

William Justin Barrow is one of 40,133 international attorneys indexed nationally. Browse international attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about William Justin Barrow

Where is William Justin Barrow's law office located?
William Justin Barrow's law practice is located in Washington, District of Columbia. The firm is Mayer Brown Llp. You can contact the office directly through this profile page.
What practice areas does William Justin Barrow handle?
William Justin Barrow focuses on patent, ip, government, international. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has William Justin Barrow practiced law?
William Justin Barrow has 18+ years of legal experience and has been licensed since 2008.
Where did William Justin Barrow go to law school?
William Justin Barrow earned their education at (B.S. Electrical, 2004); (—).
How can I contact William Justin Barrow for a consultation?
You can contact William Justin Barrow 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

B.S. Electrical
University of Pennsylvania
- 2004
American University, Washington College of Law J.D. 2008 Senior Staff American University, Washington College of Law J.D. Administrative Law Review
- In Progress

Bar Admissions

Maryland
Admitted: 2008
District of Columbia
Admitted: 2009
U.S. District Court for the Eastern District of Texas
Admitted: 2011
U.S. District Court for the Eastern District of Michigan U.S. Patent and Trademark Office
Admitted: 2013

Reviews

These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.