Maryland

Patent attorneys in Maryland

Maryland hosts 1,200 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 Maryland. 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 Nirmel & Assocs, O'Brecht and O'Brecht, and Olek Law Benefit LLC.

Top cities in Maryland

All practitioners in Maryland

Chittaranjan N Nirmel

Reg. 30408

Patent attorney

Nirmel & Assocs

Hancock, MD · 21750

717-294-6829

Babak Nouri

Reg. 76697

Patent agent

Berwyn Heights, MD · 20740

240-461-3511

Bernard Nozick

Reg. 37061

Patent agent

Bowie, MD · 20715

301-464-9007

Charles F O'Brecht· Jr

Reg. 31551

Patent attorney

O'Brecht and O'Brecht

Severna Park, MD · 21146

410-544-9521

Shelley M. O'Hara

Reg. 56174

Patent attorney

Gaithersburg, MD · 20879

910-598-8860

Trevor M. O'Neill

Reg. 72981

Patent attorney

Silver Spring, MD · 20910

561-725-2324

Dennis Patrick O'Reilley

Reg. 27932

Patent attorney

Chevy Chase, MD · 20815

301-654-2556

Thomas J Odar

Reg. 33748

Patent attorney

Bethesda, MD · 20817

301-801-4100

Ubachukwu A. Odunukwe

Reg. 80422

Patent agent

Elkridge, MD · 21075

443-202-9319

Rora Oh

Reg. 84008

Patent attorney

Germantown, MD · 20874

800-919-2493

Zachery D Olah

Reg. 77189

Patent attorney

Annapolis, MD · 21401

610-442-4010

Andrew J Olek

Reg. 53410

Patent attorney

Olek Law Benefit LLC

Bethesda, MD · 20814

240-241-0679

Williamson N. Oloo

Reg. 79504

Patent agent

Salisbury, MD · 21804

240-755-5146

Gregory S Olsen

Reg. 73158

Patent attorney

Crofton, MD · 21114

301-832-6739

Robert P. Olszewski

Reg. 76162

Patent agent

Silver Spring, MD · 20906

301-460-8324

Christopher O Onuaku

Reg. 64791

Patent agent

Lanham, MD · 20706

301-577-1536

Lynn C Onyebeke

Reg. 83514

Patent attorney

National Cancer Institute Technology Transfer Center

Rockville, MD · 20892-9702

240-276-5530

Max S Oppenheimer

Reg. 33203

Patent attorney

Hatch

Stevenson, MD · 21153

410-633-8133

Steven C. Oppenheimer

Reg. 57418

Patent attorney

Rockville, MD · 20852

301-468-9233

Robert J Orzolek

Reg. 39795

Patent attorney

AstraZeneca LP

Gaithersburg, MD · 20878

301-398-0000

Omoruyi Osahon Osula

Reg. 67605

Patent agent

Upper Marlboro, MD · 20772

404-423-8591

Christian Ottesen

Reg. 64408

Patent attorney

Walter Ottesen a Proffesional Association

North Potomac, MD · 20878

301-869-8950

Walter O Ottesen

Reg. 25544

Patent attorney

North Potomac, MD · 20878

301-869-8950

Jiangbo Ouyang

Reg. 62537

Patent agent

Clarksburg, MD · 20871

908-720-5998

Jacob S. Oyloe

Reg. 58686

Patent attorney

Medimmune

Gaithersburg, MD · 20878

301-398-5043

Chung Ki Pak

Reg. 34530

Patent attorney

Gaithersburg, MD · 20877

240-994-4719

Asokkumar Pal

Reg. 60769

Patent agent

Gaithersburg, MD · 20878

301-947-0535

Ricardo J Palabrica

Reg. 70784

Patent agent

Gaithersburg, MD · 20879

301-509-0668

Victor M. Palace

Reg. 78214

Patent attorney

Silver Spring, MD · 20910

303-704-3814

Alun L Palmer

Reg. 47838

Patent agent

Waldorf, MD · 20602

301-932-5933

Common questions

Do I need a patent attorney based in Maryland?

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 Maryland-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 Maryland?

1,200 active USPTO-registered patent practitioners list a Maryland 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.