Atty. Daniel Harper Duval

Atty. Daniel Harper Duval

Mr. Daniel Harper Duval is a lawyer practicing business, mergers & acquisitions, venture capital and 2 other areas of law.

Washington Washington 47 J. Erfahrung 47 year
Call (771) 328-9559 Book Appointment

Profile Summary

About Daniel Harper Duval at a glance

Daniel Harper Duval is a Partner based in Washington, District of Columbia, practicing at Cohen Mohr LLP. They have 47+ years of legal experience, licensed to practice since 1979. Their practice focuses on business, ip, and m&a. Admitted to practice in Georgia (1979), District of Columbia (1991), and Virginia (1993). Educated at University of Virginia (J.D., 1979) and Harvard University (A.B., 1976). Recognitions include AV Preeminent. Active member of McLean, Fairfax County and American Bar Associations. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Mr. Daniel Harper Duval is a lawyer practicing business, mergers & acquisitions, venture capital and 2 other areas of law
  • Daniel received a A.B. degree from Harvard University in 1976, and has been licensed for 47 years
  • Daniel practices at Cohen Mohr LLP in Washington, DC

Practice Areas Explained

Daniel Harper Duval's Areas of Practice

Each practice area below reflects the types of cases Daniel Harper Duval handles, with a brief overview of what that area of law covers.

Business & Corporate Law

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

Daniel Harper Duval is one of 501,317 business attorneys indexed nationally. Browse business 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.

Daniel Harper Duval is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in District of Columbia →

Mergers & Acquisitions

Daniel Harper Duval is one of 49,731 m&a attorneys indexed nationally. Browse m&a 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 Daniel Harper Duval

Where is Daniel Harper Duval's law office located?
Daniel Harper Duval's law practice is located in Washington, District of Columbia. The firm is Cohen Mohr LLP. You can contact the office directly through this profile page.
What practice areas does Daniel Harper Duval handle?
Daniel Harper Duval focuses on business, ip, m&a. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Daniel Harper Duval practiced law?
Daniel Harper Duval has 47+ years of legal experience and has been licensed since 1979.
Where did Daniel Harper Duval go to law school?
Daniel Harper Duval earned their education at (J.D., 1979); (A.B., 1976).
How can I contact Daniel Harper Duval for a consultation?
You can contact Daniel Harper Duval 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 Daniel Harper Duval received?
Daniel Harper Duval's notable recognition includes: AV Preeminent.

Education

J.D.
University of Virginia
- 1979
A.B.
Harvard University
- 1976

Awards

AV Preeminent

Bar Admissions

Georgia
Admitted: 1979
District of Columbia
Admitted: 1991
Virginia
Admitted: 1993

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