Maryland

Patent attorneys in Maryland

Maryland hosts 1,198 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 Dept. of Commerce/NIST, Edell Shapiro & Finnan, LLC, and SeaLyons LLC.

Top cities in Maryland

All practitioners in Maryland

Marianne L Lynch

Reg. 51047

Patent attorney

Dept. of Commerce/NIST

Gaithersburg, MD · 20899

301--97-5-2389

Thomas E Lynch

Reg. 38027

Patent attorney

Rockville, MD · 20850

301-251-0581

Thomas William Lynch

Reg. 42820

Patent attorney

Edell Shapiro & Finnan, LLC

Gaithersburg, MD · 20878

240-864-2470

Mary M. M. Lyons

Reg. 84788

Patent agent

SeaLyons LLC

Oakland, MD · 21550

252-340-9172

Feng Ma

Reg. 82875

Patent attorney

Rockville, MD · 20850

240-888-5169

Jundong Ma

Reg. 61789

Patent attorney

JDM Patent Law PLLC

Columbia, MD · 21044

703-380-3874

Zhengrong Ma

Reg. 66328

Patent agent

Gaithersburg, MD · 20878

240-273-6767

Stefan W Maas

Reg. 61977

Patent agent

National Institutes of Health, NIGMS

Bethesda, MD · 20892

301-594-0943

Thomas M. Mackey

Reg. 60989

Patent attorney

Baldwin, MD · 21013

410-592-8389

Robert A Maggio

Reg. 28032

Patent attorney

W R Grace and Co-Conn

Columbia, MD · 21044

410-531-4508

Romit Majumdar

Reg. 64782

Patent agent

GLAXOSMITHKLINE (GSK)

Rockville, MD · 20850

443-615-2497

Michael R Malek

Reg. 65211

Patent attorney

Odenton, MD · 21113

410-533-1922

Robert Maman

Reg. 46384

Patent agent

Potomac, MD · 20854

240-535-9409

Scott Louis Mandir

Reg. 67186

Patent attorney

BETHESDA, MD · 20814

202-924-2634

Kristy Markos

Reg. 69645

Patent agent

MacroGenics Inc.

Rockville, MD · 20850

240-552-8665

Scott B Markow

Reg. 46899

Patent attorney

Black & Decker

Middle River, MD · 21220

410-630-9429

David Lawrence Marks

Reg. 37881

Patent attorney

Baltimore, MD · 21209

240-281-7556

Michelle S Marks

Reg. 41971

Patent attorney

Cabin John, MD · 20818

301-320-7352

Melvyn I Marquis

Reg. 46398

Patent agent

Rockville, MD · 20853

301-774-5333

Steven Phillip Marquis

Reg. 35810

Patent agent

National Institute of Standards and Technology

Gaithersburg, MD · 20899-2200

301-975-3042

Byron P. Marshall· II

Reg. 65857

Patent agent

Baltimore, MD · 21230

202-907-8216

Cynthia Lan Martin

Reg. 62960

Patent attorney

GLAXOSMITHKLINE

ROCKVILLE, MD · 20815

888-825-5249

Wendy C. Martin

Reg. 44903

Patent agent

University Of Maryland, Baltimore County

Baltimore, MD · 21228

410-455-3658

Paul E Maslousky

Reg. 31932

Patent agent

Adelphi, MD · 20783

301-439-4987

Fahed K. Masood

Reg. 84262

Patent agent

Olney, MD · 20832

301-642-0002

Shelby B Mathis

Reg. 69751

Patent attorney

US Consumer Product Safety Commission

Bethesda, MD · 20814

301-504-7865

Jeffrey C Maynard

Reg. 46208

Patent attorney

Gibb I.P. Law Firm, LLC

Annapolis, MD · 21401

410-705-6405

Susan E Shaw McBee

Reg. 39294

Patent attorney

McBee Moore Woodward & Vanik IP, LLC

Frederick, MD · 21701

301-453-6101

Tammy J McBride

Reg. 51344

Patent attorney

Andrews AFB, MD · 20762

850-737-0103

Michael Edward McCabe· Jr

Reg. 37182

Patent attorney

McCabe Ali LLP

Potomac, MD · 20854

301-798-1110

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?

1,198 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.