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 PV IP PC, U.S. Food and Drug Administration, and FIDELi LAW PLLC.

Top cities in Maryland

All practitioners in Maryland

Jianping Li

Reg. 83377

Patent agent

U.S. Food and Drug Administration

Silver Spring, MD · 20993-0002

301-796-1611

Qiang Li

Reg. 68249

Patent agent

FIDELi LAW PLLC

North Potomac, MD · 20878

319-400-7547

Ronald Li

Reg. 901754

Limited recognition

University of Maryland School of Law

Baltimore, MD · 21201

516-849-5178

Shuliang Li

Reg. 70777

Patent agent

Laurel, MD · 20723

732-778-7531

Victor S. Liau

Reg. 76596

Patent agent

Gaithersburg, MD · 20898

301-869-8387

Paul Lieberman

Reg. 55956

Patent attorney

Silver Spring, MD · 20902

301-649-4266

Rochelle Lieberman

Reg. 39276

Patent attorney

Lieberman & Brandsdorfer, LLC

Rockville, MD · 20852

301-948-7775

Edwin T Lillie

Reg. 70265

Patent agent

Garrett Park, MD · 20896

240-645-6353

Vinson A. Lin

Reg. 74125

Patent attorney

McBee Moore & Vanik IP

Frederick, MD · 21701

301-453-6100

Bernard Lipman

Reg. 69317

Patent agent

Silver Spring, MD · 20910

301-585-6666

Lixin Liu

Reg. 62243

Patent agent

FDA

Silver Spring, MD · 20993

301-796-6970

Xing Liu

Reg. L1328

Limited recognition

PV IP PC

Bethesda, MD · 20817

301-571-9300

Steven Scott Lloyd

Reg. 56650

Patent attorney

Practus, LLP

Rockville, MD · 20853

301-450-3071

Joel B. Lofgren

Reg. 57758

Patent attorney

U.S. Department of the Air Force

JB Andrews, MD · 20762

240-612-6441

Charles Richard Lohrman

Reg. 46878

Patent attorney

McBee Moore Woodward & Vanik IP ,LLC

Frederick, MD · 22701

301-349-1235

Maureen Rottschaefer Long

Reg. 59982

Patent attorney

Middle River, MD · 21220

410-925-4114

Edward K Look

Reg. 74831

Patent agent

Rockville, MD · 20855

240-203-9383

Robert M. Lorence

Reg. 60274

Patent agent

Bethesda, MD · 20817

301-448-8988

Susan A. Loring

Reg. 62428

Patent agent

North Potomac, MD · 20878

301-424-4248

Carl George Love

Reg. 18781

Patent attorney

Annapolis, MD · 21401

410-757-0703

John C Lowe

Reg. 53240

Patent agent

John Lowe, P.C.

Bethesda, MD · 20816

301--32-0-3300

Ching-Yi Lu

Reg. 78374

Patent agent

Potomac, MD · 20854

301-648-1708

Ude Lu

Reg. 68711

Patent attorney

PV IP PC

Bethesda, MD · 20817

301-571-9300

Yong Lu

Reg. 56038

Patent agent

AstraZeneca/MedImmune

Gaithersburg, MD · 20878

301-398-1277

Martha T Lubet

Reg. 47267

Patent agent

National Cancer Institute Technology

Rockville, MD · 20850

240-276-5508

Adriana S Luedke

Reg. 41956

Patent attorney

Lockheed Martin Corpoation

Bethesda, MD · 20817

301-897-6000

Lawrence W. Luk

Reg. 58905

Patent agent

Darnestown, MD · 20878

301-977-0072

Mark I Lutwyche

Reg. 65442

Patent agent

Reisterstown, MD · 21136

443-717-0108

Angelique G Ly

Reg. 48832

Patent agent

Kensington, MD · 20895

Marianne L Lynch

Reg. 51047

Patent attorney

Dept. of Commerce/NIST

Gaithersburg, MD · 20899

301--97-5-2389

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.