Atty. Darrel Christopher Karl

Atty. Darrel Christopher Karl

Darrel Christopher Karl is a lawyer practicing patents, patent litigation, trade secrets. Darrel received a B.S. degree from Loyola College in 1981, and has been licensed for 41 years.

Washington Washington 41 yrs experience 41 year
Call (650) 517-0420 Book Appointment

Profile Summary

About Darrel Christopher Karl at a glance

Darrel Christopher Karl is a Partner based in Washington, District of Columbia, practicing at Finnegan Henderson Farabow Garrett And Dunner L L P. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on patent and trade secrets. Admitted to practice in Maryland (1985) and District of Columbia (1998). Educated at Catholic University of America, Columbus School of Law (J.D., 1984) and Loyola College (B.S. Engineering, 1981). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Darrel Christopher Karl is a lawyer practicing patents, patent litigation, trade secrets
  • Darrel received a B.S. degree from Loyola College in 1981, and has been licensed for 41 years
  • Darrel practices at Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. in Washington, DC

Practice Areas Explained

Darrel Christopher Karl's Areas of Practice

Each practice area below reflects the types of cases Darrel Christopher Karl handles, with a brief overview of what that area of law covers.

Patent Law

Darrel Christopher Karl is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in District of Columbia →

Trade Secrets

Darrel Christopher Karl is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets 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 Darrel Christopher Karl

Where is Darrel Christopher Karl's law office located?
Darrel Christopher Karl's law practice is located in Washington, District of Columbia. The firm is Finnegan Henderson Farabow Garrett And Dunner L L P. You can contact the office directly through this profile page.
What practice areas does Darrel Christopher Karl handle?
Darrel Christopher Karl focuses on patent, trade secrets. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Darrel Christopher Karl practiced law?
Darrel Christopher Karl has 41+ years of legal experience and has been licensed since 1985.
Where did Darrel Christopher Karl go to law school?
Darrel Christopher Karl earned their education at (J.D., 1984); (B.S. Engineering, 1981).
How can I contact Darrel Christopher Karl for a consultation?
You can contact Darrel Christopher Karl 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

J.D.
Catholic University of America, Columbus School of Law
- 1984
B.S. Engineering
Loyola College
- 1981

Bar Admissions

Maryland
Admitted: 1985
District of Columbia
Admitted: 1998

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