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 Johns Hopkins Technology Transfer, W. R. Grace, and Donald E. Bullock Registered Patent Agent.

Top cities in Maryland

All practitioners in Maryland

Margeaux G. Bull

Reg. 83177

Patent agent

W. R. Grace

Columbia, MD · 21044

410-531-4568

Donald E Bullock

Reg. 30734

Patent agent

Donald E. Bullock Registered Patent Agent

Edgewater, MD · 21037-4115

301-440-5270

Edgar S Burr

Reg. 45308

Patent agent

Kensington, MD · 20895

301-949-9840

Alexander J. Busch

Reg. 83641

Patent attorney

Bethesda, MD · 20817

301-832-5493

Charles D Buskey

Reg. 46592

Patent attorney

Department of Navy-Navair, NAWC-AD

Patuxent River, MD · 20670

301-757-9673

Jennifer O. Butler

Reg. 50872

Patent attorney

Columbia, MD · 21046

301-490-2012

Jeffrey I Butvinik

Reg. 47467

Patent attorney

Potomac, MD · 20854

301-762-6122

Edward J Cabic

Reg. 26109

Patent attorney

Columbia, MD · 21044

410-992-7197

Jinjin Cai

Reg. 83665

Patent agent

Jecho Laboratories, Inc.

Frederick, MD · 21704

240-608-8751

Lawrence N Callahan

Reg. 42379

Patent agent

Callahan Consulting

Bethesda, MD · 20817

310-493-2541

Leigh Z Callander

Reg. 55035

Patent attorney

Defense Health Agency, Office of General Counsel l,

Fort Detrick, MD · 21702

240-409-5388

Pauline A Callinan

Reg. 62455

Patent agent

Johns Hopkins Technology Transfer

Baltimore, MD · 21201

410-516-5496

Eggerton A Campbell

Reg. 51307

Patent agent

National Institutes Of Health

Rockville, MD · 20852

301-435-5282

Brian R Cannon

Reg. 70250

Patent agent

Baltimore, MD · 21201

443-928-2203

Crystal R Canterbury

Reg. 69853

Patent attorney

Food and Drug Administration, Office of Generic Drug Policy

Silver Spring, MD · 20993

301-796-1349

Jay M Cantor

Reg. 19906

Patent attorney

Potomac, MD · 20854

301-424-0355

Vincent J. Carbone

Reg. 78563

Patent attorney

Lutherville, MD · 21093

410-308-8897

Latarsha J Carithers

Reg. 73404

Patent agent

Silver Spring, MD · 20910

617-971-7356

Helene Christina Carlson

Reg. 47473

Patent attorney

Meso Scale Diagnostics, LLC.

Rockville, MD · 20850

240-314-2695

Melissa K Carman

Reg. 44476

Patent agent

Texas Instruments

Germantown, MD · 20874

301-515-8580

Marc Louis Caroff

Reg. 59793

Patent agent

Silver Spring, MD · 20905

301-384-7637

Robert K Carpenter

Reg. 34794

Patent attorney

Potomac, MD · 20854

301-802-2668

Shannon A Carroll

Reg. 58240

Patent attorney

MedImmune LLC

Gaithersburg, MD · 20878

301-398-2582

Michael T Cash

Reg. 51328

Patent attorney

Jefferson, MD · 21755

301-371-6225

Glyn W Cashwell· Jr.

Reg. 71851

Patent attorney

Cashwell Legal, LLC

Bowie, MD · 20720

443-743-4571

Rachel A Cassidy

Reg. 55883

Patent agent

Johns Hopkins Technology Transfer

Baltimore, MD · 21201

410-516-4562

Francisco Castro

Reg. 64243

Patent attorney

IonQ, Inc.

College Park, MD · 20740

301-298-7997EXT163

Jonathan R. Catazaro

Reg. 81940

Patent agent

Perryville, MD · 21903

330-224-3816

Miodrag Cekic

Reg. 58002

Patent agent

NewIPS, LLC

Bethesda, MD · 20817

301-219-6950

Marissa W Chaet

Reg. 62457

Patent agent

FDA

Silver Spring, MD · 20993

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.