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 Hunton & Williams LLP, American University, Washington College of Law, and Federal Communication Commission.

Top cities in District of Columbia

All practitioners in District of Columbia

Anna-Maria Nuryasin

Reg. 902714

Limited recognition

American University, Washington College of Law

Washington, DC · 20016

786-768-7042

Nnake I. Nweke

Reg. 59272

Patent agent

Federal Communication Commission

Washington, DC · 20554

202-418-0758

Nicholas M Nyemah

Reg. 67788

Patent attorney

Arnold & Porter LLP

Washington, DC · 20001

202-942-6681

Patrick E. Nyman

Reg. 76123

Patent agent

Wilmer Cutler Pickering Hale and Dorr LLP

Washington, DC · 20037

202-663-6126

Christopher R. O'Brien

Reg. 63208

Patent attorney

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

Washington, DC · 20005

202-772-8680

Elizabeth A. O'Brien

Reg. 76105

Patent attorney

Cherian Harkins Dunham LLP

Washington, DC · 20036

202-873-1726

Kevin M O'Brien

Reg. 30578

Patent attorney

Baker and McKenzie

Washington, DC · 20006

202-452-7032

Brendan D. O'Callaghan

Reg. 80105

Patent attorney

Baker & McKenzie LLP

Washington, DC · 20006

703-424-1652

Lucas J. O'Donnell

Reg. 67102

Patent attorney

Fish and Richardson P.C.

Washington, DC · 20024

202-626-6406

Sean A. O'Donnell

Reg. 75513

Patent attorney

Ballast IP Law, LLP

Washington, DC · 20009

202-340-4576

Shawn William O'Dowd

Reg. 34687

Patent attorney

Kenyon and Kenyon

Washington, DC · 20005

202-220-4200 EXT. 4255

Janelle A. O'Neill

Reg. 73860

Patent attorney

Otis Elevator Company

Farmington, DC · 06032

195-920-86169

Brian P O'Shaughnessy

Reg. 32747

Patent attorney

Dinsmore & Shohl LLP

Washington, DC · 20005

202-372-9115

Michael Alfred O'Shea

Reg. 35631

Patent attorney

Hunton & Williams LLP

Washington, DC · 20037

202-419-2183

Valerie L O'Shea Murray

Reg. 77027

Patent agent

Baker, Donelson, Bearman, Caldwell & Berkowitz, PC

Washington, DC · 10002

202-508-3400

Michael A Oakes

Reg. 55909

Patent attorney

Hunton & Williams LLP

Washington, DC · 20037

202-419-2172

Alexandra L. Obiol

Reg. 81915

Patent attorney

Kirkland & Ellis LLP

Washington, DC · 20004

202-924-2335

Michael A Oblon

Reg. 42956

Patent attorney

Perkins Coie LLP

Washington, DC · 20005

202-434-1607

Yumiko Oda

Reg. 75423

Patent attorney

Global IP Counselors, LLP

Washington, DC · 20036

202-293-0444

Dhiren R Odedra

Reg. 41227

Patent attorney

ODEDRA IP.PLLC

Washington, DC · 20006

571-766-8522

Kassandra M. Officer

Reg. 74083

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Washington, DC · 20001

202-408-4270

Chiedo R. Ohanyerenwa

Reg. 69508

Patent agent

Future Entertainment & Technology, LLC

Washington, DC · 20011

202-367-4958

Toyomi Ohara

Reg. 69096

Patent attorney

Morgan, Lewis & Bockius LLP

Washington, DC · 20004

202-739-3000

Chinenye Okafor

Reg. 77939

Patent attorney

Washington, DC · 20024

414-465-2367

William H Oldach· III

Reg. 42048

Patent attorney

Vorys Sater Seymour and Pease, LLP

Washington, DC · 20006

202-467-8880

Angela M. Oliver

Reg. 73271

Patent attorney

Haynes and Boone, LLP

Washington, DC, DC · 20006

202-654-4552

Justin J Oliver

Reg. 44986

Patent attorney

Fitzpatrick, Cella, Harper & Scinto

Washington, DC · 20004-1405

202-530-1010

Bradley John Olson

Reg. 40750

Patent attorney

Barnes & Thornburg, LLP

Washington, DC · 20006-4623

202-371-6369

Eric C. Olsson

Reg. 71913

Patent agent

Olsson Advisors

Washington, DC · 20009-5055

202-527-9864

Livinia N. Oluwole

Reg. 64257

Patent attorney

Washington, DC · 20001

202-656-0459

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.