District of Columbia

Patent attorneys in District of Columbia

District of Columbia hosts 2,699 active patent practitioners registered with the USPTO Office of Enrollment and Discipline. Patent attorneys and patent agents can both prepare and file patent applications, but only patent attorneys can also offer legal advice on prosecution strategy, freedom-to-operate analyses, and infringement opinions in District of Columbia. Practitioners are concentrated across 20 cities, with the largest clusters in the metros listed below. Notable firms with multiple registered practitioners in the state include Sterne, Kessler, Goldstein & Fox P.L.L.C., Tesla, Inc., and Buchanan Ingersoll & Rooney PC.

Top cities in District of Columbia

All practitioners in District of Columbia

Paul I. Margulies

Reg. 59580

Patent attorney

Tesla, Inc.

Washington, DC · 20006

202-695-5388

Karen Rose Markowicz

Reg. 36351

Patent agent

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Washington, DC · 20005

202-772-8637

Mythili Markowski

Reg. 67063

Patent attorney

Buchanan Ingersoll & Rooney PC

Washington, DC · 20006

202-452-7314

Jessica L. A. Marks

Reg. 67451

Patent attorney

Unified Patents, Inc.

Washington, DC · 20009

571-488-3864

Charles Michael Marmelstein

Reg. 25895

Patent attorney

Arent Fox LLP

Washington, DC · 20036-5344

202-857-6000

John L Marquardt· Jr

Reg. 55429

Patent attorney

Marquardt Law

Washington, DC · 20007

202-880-1444

Juan Carlos Angeles Marquez

Reg. 34072

Patent attorney

Marquez Intellectual Property Law Office, PLLC

Washington, DC · 20006

202-349-1690

David R Marsh

Reg. 41408

Patent attorney

Arnold and Porter Kaye Scholer LLP

Washington, DC · 20001-3743

202-942-5068

Virgil Homer Marsh

Reg. 23083

Patent attorney

Fisher, Christen & Sabol

Washington, DC · 20036

202-659-2000

Wade Douglas Marshall

Reg. 903228

Limited recognition

The George Washington University School of Law

Washington, DC · 20052

210-323-8969

Brian J. Marstall

Reg. 73023

Patent attorney

Michael Best & Friedrich LLP

Washington, DC · 20004

202-747-9563

Deborah A Martin

Reg. 44222

Patent attorney

Honigman LLP

Washington DC, DC · 20005-2111

202-899-4134

James T Martin

Reg. 22937

Patent attorney

J.T. Martin

Washington, DC · 20007

202-296-3650

Mikayla Simone Martin

Reg. 903102

Limited recognition

Howard University School of Law

Washington, DC · 20008

614-607-3090

Thomas C. Martin

Reg. 57677

Patent attorney

Baker Botts LLP

Washington, DC · 20004-2400

202-639-7752

William D Martin· Jr

Reg. 33335

Patent agent

Washington, DC · 20019

202-575-8172

Shoshana G Marvin

Reg. 70077

Patent attorney

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Washington, DC · 20005

202-772-8850

Kamyar M Maserrat

Reg. 75022

Patent attorney

Dentons US LLP

Washington, DC · 20006-1102

202-496-7376

Mark F. Mashack

Reg. 73782

Patent attorney

Blank Rome

Washington, DC · 20006

202-420-2200

Geoffrey C Mason

Reg. 42847

Patent attorney

Shook Hardy and Bacon

Washington, DC · 20005-2004

202-783-8400

Joanna K Mason

Reg. 56408

Patent agent

Brake Hughes Bellermann.LLP

Washington, DC · 20006

202-470-6460

Richard James Mason

Reg. 67060

Patent attorney

Brake Hughes Bellermann LLP

Washington, DC · 20006

202-753-6918

Zachary D. Mason

Reg. 78679

Patent attorney

Bookoff McAndrews

Washington, DC · 20006

771-208-3462

Mary Katherine O. Mastaler

Reg. 84413

Patent agent

Michael Best

Washington, DC · 20024

202-747-9560

James T Masters

Reg. 77225

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Washington, DC · 20001-4413

202-408-4127

Robert Martin Masters

Reg. 35603

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Washington, DC · 20006

202-747-1935

David G. Mata

Reg. 72300

Patent attorney

Greenberg Traurig, LLP

Washington, DC · 20037

202-573-8201

Joseph David Matal

Reg. L1362

Limited recognition

Haynes and Boone, LLP

Washington, DC · 20006

202-654-4533

Nicholas M. Mathews

Reg. 66067

Patent attorney

Hunton & Williams LLP

Washington, DC · 20037

202-955-1804

Thomas J Matikainen

Reg. 73291

Patent attorney

NSIP Law

Washington, DC · 20036

202-429-0020

Common questions

Do I need a patent attorney based in District of Columbia?

No. Every USPTO-registered patent practitioner is licensed to file applications on behalf of inventors in any state, regardless of where the practitioner's office is. Choosing a District of Columbia-based practitioner can simplify in-person inventor signings, local meetings, and same-time-zone calls, but it is not a legal requirement.

How many patent attorneys are licensed in District of Columbia?

2,699 active USPTO-registered patent practitioners list a District of Columbia office address on the OEDCI roster. This includes both patent attorneys (who can also offer legal advice) and patent agents (who can prepare and file patents but not offer broader legal advice).

What is the difference between a patent attorney and a patent agent?

Both pass the USPTO Patent Bar and can prepare, file, and prosecute patent applications. Only patent attorneys also hold a state bar license, meaning they can additionally offer legal advice on infringement, licensing, and litigation strategy. Patent agents tend to charge less per hour and are common at large in-house IP departments.