Atty. Mark J. Feldstein

Atty. Mark J. Feldstein

Mark J. Feldstein is a lawyer practicing patents, patent litigation, trade secrets and 4 other areas of law.

Washington Washington 25 J. Erfahrung 25 year
Call (202) 770-4377 Book Appointment

Profile Summary

About Mark J. Feldstein at a glance

Mark J. Feldstein is a Partner based in Washington, District of Columbia, practicing at Finnegan Henderson Farabow Garrett And Dunner L L P. They have 25+ years of legal experience, licensed to practice since 2001. Their practice focuses on patent and trade secrets. Admitted to practice in Maryland (2001) and District of Columbia registered to practice before U.S. Patent and Trademark Office (2002). Educated at Georgetown University Law Center (J.D., 2001) and The George Washington University (B.S., 1991). Recognitions include BV Distinguished. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Mark J. Feldstein is a lawyer practicing patents, patent litigation, trade secrets and 4 other areas of law
  • Mark received a B.S. degree from The George Washington University in 1991, and has been licensed for 25 years
  • Mark practices at Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. in Washington, DC

Practice Areas Explained

Mark J. Feldstein's Areas of Practice

Each practice area below reflects the types of cases Mark J. Feldstein handles, with a brief overview of what that area of law covers.

Patent Law

Mark J. Feldstein is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in District of Columbia →

Trade Secrets

Mark J. Feldstein 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 Mark J. Feldstein

Where is Mark J. Feldstein's law office located?
Mark J. Feldstein'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 Mark J. Feldstein handle?
Mark J. Feldstein focuses on patent, trade secrets. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Mark J. Feldstein practiced law?
Mark J. Feldstein has 25+ years of legal experience and has been licensed since 2001.
Where did Mark J. Feldstein go to law school?
Mark J. Feldstein earned their education at (J.D., 2001); (B.S., 1991).
How can I contact Mark J. Feldstein for a consultation?
You can contact Mark J. Feldstein 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 Mark J. Feldstein received?
Mark J. Feldstein's notable recognition includes: BV Distinguished.

Education

J.D.
Georgetown University Law Center
- 2001
B.S.
The George Washington University
- 1991

Awards

BV Distinguished

Bar Admissions

Maryland
Admitted: 2001
District of Columbia registered to practice before U.S. Patent and Trademark Office
Admitted: 2002

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